Public Class: ASE Version 2.0 4th July 2016 ST(Security Target) Lite  2013 Samsung Electronics Co., Ltd. All rights reserved. Common Criteria Information Technology Security Evaluation S3FT9MH/S3FT9MV/S3FT9MG 16-bit RISC Microcontroller for Smart Card with optional Secure RSA and ECC Library including specific IC Dedicated Software Important Notice Samsung Electronics Co. Ltd. (―Samsung‖) reserves the right to make changes to the information in this publication at any time without prior notice. All information provided is for reference purpose only. Samsung assumes no responsibility for possible errors or omissions, or for any consequences resulting from the use of the information contained herein. This publication on its own does not convey any license, either express or implied, relating to any Samsung and/or third-party products, under the intellectual property rights of Samsung and/or any third parties. 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San #24 Nongseo-Dong, Giheung-Gu Yongin-City, Gyeonggi-Do, Korea 446-711 Contact Us: junghyun.kim@samsung.com Home Page: http://www.samsungsemi.com Chip Handling Guide Precaution against Electrostatic Discharge When using semiconductor devices, ensure that the environment is protected against static electricity: 1. Wear antistatic clothes and use earth band. 2. All objects that are in direct contact with devices must be made up of materials that do not produce static electricity. 3. Ensure that the equipment and work table are earthed. 4. Use ionizer to remove electron charge. Contamination Do not use semiconductor products in an environment exposed to dust or dirt adhesion. Temperature/Humidity Semiconductor devices are sensitive to:  Environment  Temperature  Humidity High temperature or humidity deteriorates the characteristics of semiconductor devices. Therefore, do not store or use semiconductor devices in such conditions. Mechanical Shock Do not to apply excessive mechanical shock or force on semiconductor devices. Chemical Do not expose semiconductor devices to chemicals because exposure to chemicals leads to reactions that deteriorate the characteristics of the devices. Light Protection In non- Epoxy Molding Compound (EMC) package, do not expose semiconductor IC to bright light. Exposure to bright light causes malfunctioning of the devices. However, a few special products that utilize light or with security functions are exempted from this guide. Radioactive, Cosmic and X-ray Radioactive substances, cosmic ray, or X-ray may influence semiconductor devices. These substances or rays may cause a soft error during a device operation. Therefore, ensure to shield the semiconductor devices under environment that may be exposed to radioactive substances, cosmic ray, or X-ray. EMS (Electromagnetic Susceptibility) Strong electromagnetic wave or magnetic field may affect the characteristic of semiconductor devices during the operation under insufficient PCB circuit design for Electromagnetic Susceptibility (EMS). Revision History Revision No. Date Description 1.0 14 th June 2015 - Creation 1.1 15 th June 2015 - The chapter 4.1 is updated. 1.2 23 th June 2015 - The chapter 1.2.3 is updated. 1.3 26th August 2015 - Update the chapter 1.2.2, 6.1 and 7.1 for RNG 1.4 05 th January 2016 - Update information of AIS31 RNG component 1.5 06 th January 2016 - Further update information of AIS31 RNG component 1.6 07 th March 2016 - The chapter 7.1 is updated 1.7 11 st March 2016 - The chapter 6 is updated 1.8 26 th April 2016 - The chapter 1,6 and 7 is updated 1.9 29 th April 2016 - The chapter 6 and 7 is updated 2.0 4 th July 2016 - The chapter 1.2 is updated Table of Contents 1 ST INTRODUCTION .......................................................................................13 1.1 Security Target and TOE Reference..........................................................................................................14 1.2 TOE Overview and TOE Description .........................................................................................................15 1.2.1 Introduction.........................................................................................................................................15 1.2.2 TOE Definition ....................................................................................................................................15 1.2.3 TOE Features .....................................................................................................................................21 1.2.4 TOE Life cycle ....................................................................................................................................24 1.3 Interfaces of the TOE.................................................................................................................................25 1.4 TOE Intended Usage .................................................................................................................................25 2 CONFORMANCE CLAIMS.............................................................................27 2.1 CC Conformance Claim .............................................................................................................................28 2.2 PP Claim ....................................................................................................................................................28 2.3 Package Claim...........................................................................................................................................28 2.4 Conformance Claim Rationale...................................................................................................................28 3 SECURITY PROBLEM DEFINITION ..............................................................30 3.1 Description of Assets .................................................................................................................................30 3.2 Threats.......................................................................................................................................................32 3.2.1 Standard Threats................................................................................................................................34 3.2.2 Threats related to security services....................................................................................................36 3.2.3 Threats related to additional TOE Specific Functionality....................................................................36 3.2.4 Threats related to Authentication of the Security IC...........................................................................37 3.3 Organizational Security Policies ................................................................................................................38 3.4 Assumptions...............................................................................................................................................40 4 SECURITY OBJECTIVES ..............................................................................42 4.1 Security Objectives for the TOE.................................................................................................................43 4.1.1 Standard Security Objectives .............................................................................................................44 4.1.2 Security Objectives related to Specific Functionality (referring to SC4).............................................47 4.1.3 Security Objectives for Added Function .............................................................................................47 4.2 Security Objectives for the Security IC Embedded Software Development Environment.........................48 4.2.1 Clarification of ―Treatment of User Data (OE.Resp-Appl)‖ .................................................................48 4.3 Security Objectives for the Operational Environment................................................................................49 4.3.1 Clarification of ―Protection during Composite Product Manufacturing (OE.Process-Sec-IC)‖ ...........49 4.4 Security Objectives Rationale ....................................................................................................................50 5 EXTENDED COMPONENTS DEFINITION .....................................................53 5.1 Definition of the Family FCS_RNG ............................................................................................................54 5.2 Definition of the Family FMT_LIM..............................................................................................................55 5.3 Definition of the Family FAU_SAS.............................................................................................................57 5.4 Definition of the Family FDP_SDC.............................................................................................................58 5.5 Definition of the Family FIA_API................................................................................................................59 6 IT SECURITY REQUIREMENTS ....................................................................60 6.1 Security Functional Requirements for the TOE .........................................................................................61 6.1.1 Malfunctions........................................................................................................................................61 6.1.2 Abuse of Functionality ........................................................................................................................61 6.1.3 Physical Manipulation and Probing ....................................................................................................62 6.1.4 Leakage..............................................................................................................................................64 6.1.5 Random Numbers (DTRNG FRO)......................................................................................................65 6.1.6 Alternative Random Numbers (EHP DTRNG FRO)...........................................................................66 6.1.7 Memory Access Control .....................................................................................................................67 6.1.8 Cryptographic Support........................................................................................................................70 6.1.9 Triple-DES Operation .........................................................................................................................70 6.1.10 AES Operation..................................................................................................................................70 6.1.11 Rivest-Shamir-Adleman (RSA) Operation (optional)........................................................................71 6.1.12 Rivest-Shamir-Adleman (RSA) Key Generation (optional) ..............................................................71 6.1.13 Elliptic Curve DSA Operation (optional) ...........................................................................................72 6.1.14 Elliptic Curve DSA Key Generation (optional) ..................................................................................72 6.1.15 Elliptic Curve Diffie-Hellman (ECDH) Key Agreement (optional) .....................................................73 6.1.16 Secure Hash Algorithm (SHA) (optional)..........................................................................................74 6.1.17 Bootloader ........................................................................................................................................74 6.1.18 Authentication Proof of Identity.........................................................................................................77 6.1.19 Summary of Security Functional Requirements ...............................................................................77 6.2 TOE Assurance Requirements ..................................................................................................................79 6.3 Security Requirements Rationale ..............................................................................................................81 6.3.1 Rationale for the Security Functional Requirements ..........................................................................81 6.3.2 Dependencies of Security Functional Requirements .........................................................................86 6.3.3 Rationale for the Assurance Requirements........................................................................................88 6.3.4 Security Requirements are Internally Consistent ...............................................................................89 7 TOE SUMMARY SPECIFICATION.................................................................92 7.1 List of Security Functional Requirements ..................................................................................................93 7.2 Architectural Design Summary ................................................................................................................100 8 ANNEX .........................................................................................................101 8.1 Glossary...................................................................................................................................................101 8.2 Abbreviations ...........................................................................................................................................102 8.3 References...............................................................................................................................................104 List of Figures Figure Title Page Number Number Figure 1 S3FT9MH/S3FT9MV/S3FT9MG Block Diagram.....................................................................................16 Figure 2 Definition of ―TOE Delivery‖ and responsible Parties ..............................................................................25 Figure 3 Standard Threats .....................................................................................................................................33 Figure 4 Threats related to security service...........................................................................................................33 Figure 5 Interactions between the TOE and its outer world...................................................................................34 Figure 6 Policies.....................................................................................................................................................38 Figure 7 Assumptions ............................................................................................................................................40 Figure 8 Standard Security Objectives ..................................................................................................................43 Figure 9 Security Objectives related to Specific Functionality ...............................................................................44 List of Tables Table Title Page Number Number Table 1 TOE Configuration...................................................................................................................................21 Table 3 Privilege and User Modes basic description ...........................................................................................21 Table 4 Security Objectives versus Assumptions, Threats or Policies ................................................................50 Table 5 Security Functional Requirements defined in Smart Card IC Protection Profile.....................................78 Table 6 Augmented Security Functional Requirements.......................................................................................78 Table 8 Dependencies of the Security Functional Requirements........................................................................87 List of Conventions Register RW Access Type Conventions Type Definition Description R Read Only The application has permission to read the Register field. Writes to read-only fields have no effect. W Write Only The application has permission to write in the Register field. RW Read & Write The application has permission to read and writes in the Register field. The application sets this field by writing 1’b1 and clears it by writing 1’b0. Register Value Conventions Expression Description x Undefined bit X Undefined multiple bits ? Undefined, but depends on the device or pin status Device dependent The value depends on the device Pin value The value depends on the pin status Reset Value Conventions Expression Description 0 Clears the register field 1 Sets the register field x Don't care condition Warning: Some bits of control registers are driven by hardware or write operation only. As a result the indicated reset value and the read value after reset might be different. List of Terms Terms Descriptions Application Data All data managed by the Security IC Embedded Software in the application context. Application data comprise all data in the final Security IC. Composite Product Integrator Role installing or finalising the IC Embedded Software and the applications on platform transforming the TOE into the unpersonalised Composite Product after TOE delivery. The TOE Manufacturer may implement IC Embedded Software delivered by the Security IC Embedded Software Developer before TOE delivery (e.g. if the IC Embedded Software is implemented in ROM or is stored in the non-volatile memory as service provided by the IC Manufacturer or IC Packaging Manufacturer) Composite Product Manufacturer The Composite Product Manufacturer has the following roles (i) the Security IC Embedded Software Developer (Phase 1), (ii) the Composite Product Integrator (Phase 5) and (iii) the Personaliser (Phase 6). If the TOE is delivered after Phase 3 in form of wafers or sawn wafers (dice) he has the role of the IC Packaging Manufacturer (Phase 4) in addition. End-consumer User of the Composite Product in Phase 7. IC Dedicated Software IC proprietary software embedded in a Security IC (also known as IC firmware) and developed by the IC Developer. Such software is required for testing purpose (IC Dedicated Test Software) but may provide additional services to facilitate usage of the hardware and/or to provide additional services (IC Dedicated Support Software). IC Dedicated Test Software That part of the IC Dedicated Software (refer to above) which is used to test the TOE before TOE Delivery but which does not provide any functionality thereafter. IC Dedicated Support Software That part of the IC Dedicated Software (refer to above) which provides functions after TOE Delivery. The usage of parts of the IC Dedicated Software might be restricted to certain phases. Initialisation Data Initialisation Data defined by the TOE Manufacturer to identify the TOE and to keep track of the Security IC’s production and further life-cycle phases are considered as belonging to the TSF data. These data are for instance used for traceability and for TOE identification (identification data). Integrated Circuit (IC) Electronic component(s) designed to perform processing and/or memory functions. Pre-personalisation Data Any data supplied by the Card Manufacturer that is injected into the non-volatile memory by the Integrated Circuits manufacturer (Phase 3). These data are for instance used for traceability and/or to secure shipment between phases. Security IC Composition of the TOE, the Security IC Embedded Software, User Data and the package (the Security IC carrier). Security IC Embedded Software Software embedded in a Security IC and normally not being developed by the IC Designer. The Security IC Embedded Software is designed in Phase 1 and embedded into the Security IC in Phase 3 or in later phases of the Security IC product life-cycle. Some part of that software may actually implement a Security IC application others may provide standard services. Nevertheless, this distinction doesn’t matter here so that the Security IC Embedded Software can be considered as being application dependent whereas the IC Dedicated Software is definitely not. Security IC Product Composite product which includes the Security Integrated Circuit (i.e. the TOE) and the Embedded Software and is evaluated as composite target of evaluation in the sense of the Supporting Document TOE Delivery The period when the TOE is delivered which is either (i) after Phase 3 (or before Phase 4) if the TOE is delivered in form of wafers or sawn wafers (dice) or (ii) after Phase 4 (or before Phase 5) if the TOE is delivered in form of packaged products. TOE Manufacturer The TOE Manufacturer must ensure that all requirements for the TOE and its development and production environment are fulfilled. The TOE Manufacturer has the following roles: (i) IC Developer (Phase 2) and (ii) IC Manufacturer (Phase 3). If the TOE is delivered after Phase 4 in form of packaged products, he has the role of the (iii) IC Packaging Manufacturer (Phase 4) in addition. TSF data Data created by and for the TOE, that might affect the operation of the TOE. This includes information about the TOE’s configuration, if any is coded in non-volatile non- programmable memories (ROM), in specific circuitry, in non-volatile programmable memories (for instance E2PROM) or a combination thereof. User data All data managed by the Smartcard Embedded Software in the application context. User data comprise all data in the final Smartcard IC except the TSF data. List of Acronyms Acronyms Descriptions CC Common Criteria EAL Evaluation Assurance Level IT Information Technology PP Protection Profile ST Security Target TOE Target of Evaluation TSC TSF Scope of Control TSF TOE Security Feature TSFI TSF Interface TSP TOE Security Policy Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 13/105 1 ST INTRODUCTION 1 This introductory chapter contains the following sections: 1.1 Security Target and TOE Reference 1.2 TOE Overview and TOE Description 1.3 Interfaces of the TOE 1.4 TOE Intended Usage Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 14/105 1.1 Security Target and TOE Reference 2 The Security Target Lite version is 2.0 and dated 04 th July 2016 The Security Target Lite is strictly compliant to 3 [5] Eurosmart Security IC Platform Protection Profile with Augmentation Packages, Version 1.0, BSI-CC- PP-0084-2014. 4 The Protection Profile and the Security Target are built on Common Criteria version 3.1.  Title: Security Target Lite of S3FT9MH/S3FT9MV/S3FT9MG 16-bit RISC Microcontroller for Smart Card with optional Secure RSA and ECC Library including specific IC Dedicated Software  Target of Evaluation: S3FT9MH/S3FT9MV/S3FT9MG  TOE reference: S3FT9MH/S3FT9MV/S3FT9MG_rev0_SW10-49-70-10-102-20_GU111-15-004-20-12- 21-11-19-14-20-06  Provided by: Samsung Electronics Co., Ltd.  Common Criteria version : 5 [1] Common Criteria, Part 1: Common Criteria for Information Technology Security Evaluation, Part 1: Introduction and General Model, Version 3.1, Revision 4, September 2012, CCMB-2012-09-001 6 [2] Common Criteria, Part 2: Common Criteria for Information Technology Security Evaluation,Part2: Security Functional Components, Version 3.1, Revision 4, September 2012, CCMB-2012-09-002 7 [3] Common Criteria, Part 3: Common Criteria for Information Technology Security Evaluation, Part 3: Security Assurance Components, Version 3.1, Revision 4, September 2012, CCMB-2012-09-003 8 [4] Common Methodology for Information Technology Security Evaluation, Evaluation Methodology, Version 3.1, Revision 4, September 2012, CCMB-2012-09-004 Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 15/105 1.2 TOE Overview and TOE Description 1.2.1 Introduction 9 The Target of Evaluation (TOE), the S3FT9MH/S3FT9MV/S3FT9MG microcontroller featuring the TORNADO TM -E cryptographic coprocessor, is a smartcard integrated circuit which is composed of a processing unit, security components, contactless and contact based I/O ports, hardware circuit for testing purpose during the manufacturing process and volatile and non-volatile memories (hardware). The TOE also includes any IC Designer/Manufacturer proprietary IC Dedicated Software as long as it physically exists in the smartcard integrated circuit after being delivered by the IC Manufacturer. Such software (also known as IC firmware) is used for testing purpose during the manufacturing process but also provides additional services to facilitate the usage of the hardware and/or to provide additional services, including optional RSA/ECC public key cryptographic library, an [6]AIS31 compliant random number generation library and an [6]AIS31 compliant random number generator. The RSA/ECC library further includes the functionality of hash computation. The use for keyed hash operations like HMAC or similar security critical operations involving keys and other secrets, is not subject of this TOE and requires specific security improvements and DPA analysis including the operating system, which is not part of this TOE. However, this functionality is intended to be used for signature generation and verification only. All other software is called Smartcard Embedded Software and is not part of the TOE. 10 Regarding the RSA and ECC library, the user has the possibility to tailor this IC Dedicated Software part of the TOE during the manufacturing process by deselecting the RSA and ECC library. Hence the TOE can be delivered with or without the functionality of the RSA and ECC library what’s resulting in two TOE configurations. This is considered in this Security Target and corresponding notes (indicated by ―optional‖) are added where required. If the user decides not to use the RSA/ECC cryptographic library, the library is not delivered to the user and the accompanying Rivest-Shamir-Adleman (O.RSA) and Elliptic Curve Cryptography (O.ECC) is not provided by the TOE. Deselecting RSA and ECC library means excluding the code implementing functionality, which the user decided not to use. Excluding the code of the deselected functionality has no impact on any other security policy of the TOE, it is exactly equivalent to the situation where the user decides just not to use the functionality. 11 The only difference between S3FT9MH, S3FT9MV and S3FT9MG is at the FLASH memory size in a logical meaning, say, S3FT9MH(500KB), S3FT9MV(420KB) and S3FT9MG(320KB), which means that all 3 microcontrollers have the same layout. 1.2.2 TOE Definition 12 The S3FT9MH/S3FT9MV/S3FT9MG single-chip CMOS micro-controller is designed and packaged specifically for "Smart Card" applications. 13 The CalmRISC16 CPU architecture of the S3FT9MH/S3FT9MV/S3FT9MG microcontroller follows the Harvard style, that is, it has separate program memory and data memory. Both instruction and data can be fetched simultaneously without causing a stall, using separate paths for memory access. 14 The main security features of the S3FT9MH/S3FT9MV/S3FT9MG integrated circuit are:  Security sensors or detectors or filters  Shields  Life cycle detector  Dedicated tamper-resistant design based on synthesizable glue logic and secure topology  Dedicated hardware mechanisms against side-channel attacks Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 16/105  Secure DES and AES Symmetric Cryptography support  Secure TORNADO TM -E coprocessor for the support of RSA and ECC cryptographic operations  One Hardware Digital True Random Number Generator (DTRNG FRO) that meet PTG.2 class of BSI- AIS31 (German scheme).  The IC Dedicated Software includes: - A modular arithmetic library for the support of RSA and ECC (with SHA) cryptographic operations (optional) - Two DTRNG FRO and EHP DTRNG FRO libraries built around Hardware DTRNG FRO together with two corresponding DTRNG FRO and EHP DTRNG FRO application notes. The former meets some of ANSSI requirements (French scheme) as well as PTG.2 class of BSI-AIS31 (German scheme) while the latter generates random numbers that pass Test Procedure A specified by AIS31 standard. 15 The main hardware blocks of the S3FT9MH/S3FT9MV/S3FT9MG Integrated Circuit are described in Figure 1 below: SecuCalm CPU FLASH Special areas 768 Bytes FLASH 500KB/420KB /320KB RNG MPU AES CRC RAM 9KB Clock Timers (16-bit Timer / 20-bit WDT) Detectors & Security Control Power on reset Contact Interface DES ROM 40KB DMA_RAM 1.25KB Contactless Interface CryptoRAM 5KB TORNADO Crypto Co- processor IVR (Internal Voltage Regulator) Only for contactless device SIO Vcc RST CLK GND L1 L2 Address and Data Bus Peripherals monitor Figure 1 S3FT9MH/S3FT9MV/S3FT9MG Block Diagram NOTE:That only the Triple DES algorithm belongs to the TOE, not the Single DES. Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 17/105 The TOE consists of the following Hardware and Software: TOE Hardware  500Kbytes (S3FT9MH), 420Kbytes (S3FT9MV),320Kbytes (S3FT9MG) FLASH / 9K bytes RAM / 5K bytes Crypto. RAM / 40Kbytes ROM / 768 Bytes Flash special area  16-bit Central Processing Unit (CPU)  Internal Voltage Regulator (IVR)  Detectors & Security Logic  Filters  Digital True Random Number Generator (DTRNG FRO)  Bilateral Pseudo Random Number Generator (BPRNG)  Memory Protection Unit (MPU)  Triple DES cryptographic coprocessor with 112 or 168 bits key size (version 2.5)  AES cryptographic coprocessor with 128 bits, 192bits and 256bits key size (version 4.1)  TORNADO TM -E supporting modular multiplications for the operand size up to 4128-bit and modular additions/subtractions for the operand size up to 544-bit  Hardware UART for contact and contactless I/O modes with 1.25Kbytes DMA RAM  Address & data buses  Internal Clock  Timers  Power on Reset  Error Correcting Code (ECC)  32bit -CRC32 Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 18/105 TOE Software 16 The TOE software comprises the following components:  Test ROM code that is used for testing the chip during production. The Test ROM Code is not part of the TOE  The TORNADO-E Secure RSA/ECC library (optional) TORNADO-E is a hardware coprocessor for high speed modular multiplications, modular additions and modular subtractions. The TORNADO-E Secure RSA/ECC library is a software library built on the TORNADO-E coprocessor that provides high level interface for RSA and ECC cryptographic algorithms. The RSA functions of the library included in the TOE are:  RSA_KeyGen_Secure (RSA public/private key pair generation)  TND_RSA_SigSTD_Secure (RSA signature generation with the standard method)  TND_RSA_SigCRT_Secure (RSA signature generation with the CRT method)  TND_RSA_Verify (RSA signature verification)  RSA_R2modM_precompute_sec (R^2 value precomputation for the standard RSA)  RSA_R2modPandQ_precompute_sec (R^2 value precomputation for the CRT RSA) The library supports RSA operations of the key size from 32-bit to 4096-bit by step of 2-bit. However, only the key size from 1280-bit up to 4096-bit is within the scope of this evaluation. The functions TND_RSA_SigSTD_Secure and TND_RSA_SigCRT_Secure implement some countermeasures against SPA, DPA and DFA attacks. The RSA_KeyGen_Secure function implements some countermeasures against SPA and DFA attacks. . Finally, the RSA_R2modM_precompute_sec and RSA_R2modPandQ_precompute_sec functions implement some countermeasures against the fault attack.  The TORNADO-E Secure RSA/ECC library provides a set of functions to implement ECC cryptographic algorithms. In particular, it provides some functions to implement the ECDSA signing/verifying and the ECDH key exchange protocol. The library implements ECC for general curves over prime fields of size from 192-bit to 512-bit and the only certain curves are in the scope of this evaluation. The ECC functions of the library included in the TOE are:  ECDSA_keygen (Ephemeral or static key pair generation for ECDSA signing/verifying)  ECDSA_sign_digest (ECDSA signature generation for a message digest)  ECDSA_verify_digest (ECDSA signature verification for a message digest)  ECDH_generate (ECDH secret key derivation) The functions ECDSA_keygen, ECDSA_sign_digest and ECDH_generate implement some countermeasures against SPA, DPA and DFA for protecting the private key. The function ECDSA_verify_digest implements some countermeasures against DFA. The base point is assumed to be public. Note1) The RSA/ECC library supports any valid elliptic curves over prime fields of size from 192-bit to 512-bit. However, the standard curves listed below whose security has been proven are in the scope of this evaluation. １) [NIST curves]: Curves P-192, P-224, P-256, P-384 Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 19/105 ２) [Brainpool curves]: brainpoolP192r1, brainpoolP192t1, brainpoolP224r1, brainpoolP224t1, brainpoolP256r1, brainpoolP256t1, brainpoolP320r1, brainpoolP320t1, brainpoolP384r1, brainpoolP384t1, brainpoolP512r1, brainpoolP512t1 ３) [SEC-recommended curves]: secp192k1, secp192r1, secp224k1, secp224r1, secp256k1, secp256r1, secp384r1 The TORNADO-E Secure RSA/ECC library provides the functions for calculating hash (digest) values using the SHA1, SHA224, SHA256, SHA384 and SHA512 algorithms as specified in [FIPS PUB 180-3], but only those related to SHA224, SHA256, SHA384 and SHA512 listed below are within the scope of this evaluation:  SHA224_init, SHA224_update, SHA224_final  SHA256_init, SHA256_update, SHA256_final  SHA384_init, SHA384_update, SHA384_final  SHA512_init, SHA512_update, SHA512_final These functions are not security relevant functions, i.e. they must not be used to hash security values like keys etc. There are implemented no countermeasures against side channel attacks. The TOE provides the functionality of hash computation if and only if the optional TORNADO-E Secure RSA/ECC library is delivered. .  A Digital True Random Number Generator (DTRNG FRO) library that fulfills the requirements of Class PTG.2 (German Scheme) as well as meets some of ANSSI requirements (French scheme)  Another DTRNG FRO library called EHP DTRNG FRO library that passes statistical tests required by Test Procedure A for AIS31 standard.  Secure Boot Loader can download the encrypted user code with AES 17 The TOE configuration is summarized in table 1 below: Item type Item Versio n Date Form of delivery Hardware S3FT9MH/S3FT9MV/S3FT9MG 16-Bit RISC Microcontroller for Smart Card 0 - Wafer or Module Software Test ROM Code 1.0 - - Included in S3FT9MH/MV/MG Test ROM - Test ROM code is not part of the TOE. Software Secure Boot loader code (S3FT9xx_Bootloader_80nm_AES_MH_R elease_20140318.zip) 4.9 - Included in S3FT9MH/MV/MG in ROM Software DTRNG FRO library (S3FT9XX_DTRNG_lib_v7.0_LETI_deliver y_20150609.zip) 7.0 - Software Library. This library is delivered as object file and is optionally integrated into user NVM code. Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 20/105 Item type Item Versio n Date Form of delivery Software EHP DTRNG FRO library (S3FT9XX_EHP_DTRNG_lib_v1.0_LETI_d elivery_20150529.zip) 1.0 - Software Library. This library is delivered as object file and is optionally integrated into user NVM code. Software (optional) CE1 Secure RSA/ ECC Library (20160628_PKA_lib_CE1_v1.02_LETI_deli very.zip) 1.02 - Software Library. This library is delivered as object file and is optionally integrated into user NVM code. Software (optional) CE1 Secure RSA/ ECC Library (20160628_PKA_lib_CE1_v2.00_LETI_deli very.zip) 2.0 - Software Library. This library is delivered as object file and is optionally integrated into user NVM code. Document DTRNG FRO Application Note (S3FT9XX_DTRNG_FRO_AN_V1.11.pdf) 1.11 - Softcopy Document EHP DTRNG FRO Application Note (S3FT9XX_EHP_DTRNG_FRO_AN_v1.5) 1.5 - Softcopy Document Tornado-E RSA/ECC Library API Manual for CE1 Secure RSA/ ECC Library v1.02 (PKA_Lib_CE1_APIManual_v0.04.pdf) 0.04 - Softcopy Document Tornado-E RSA/ECC Library API Manual for CE1 Secure RSA/ ECC Library v2.0 (CE1 RSA ECC Library API Manual v2.00.pdf) 2.0 - Softcopy Document Hardware User’s manual (S3FT9XX_UM_REV1.20.pdf) 1.2 - Softcopy Document Security Application Note (SAN_S3FT9MD_MF_MH_v2.1.pdf) 2.1 - Softcopy Document Chip Delivery Specification (S3FT9MH_DV11.pdf) 1.1 - Softcopy Document Boot Loader Specification (S3FT9xx_80nm_BootloaderSpecification_ v1.9.pdf) 1.9 - Softcopy Document Architecture Reference: SecuCalm CPU Core 14 - Softcopy Document Boot Loader Appendix (S3FT9xx_80nm_BootloaderSpecification_ Appendix02.pdf) 2.0 - Optional Softcopy Document Errata for UMv1.2 (S3FT9XX_UM1.2_Errata_v0.6.pdf) 0.6 - Softcopy Address Items The value Refer to the chapter 7 in Device type S3FT9MH: 1611 Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 21/105 Delivery specification S3FT9MV: 161F S3FT9MG: 1610 IC Version 00 Test ROM Code Version 10 Boot loader code version 49 Crypto. Library Version 1.02, 2.0 DTRNG FRO Library Version 7.0 EHP DTRNG FRO Library Version 1.0 Table 1 TOE Configuration 18 PRIVILEGE mode and USER mode PRIVILEGE mode USER mode Protected mode for the operating system. All the control registers including security related special registers can be read or written only if CPU runs in this mode. This mode cannot access all control registers. Table 3 Privilege and User Modes basic description The TOE can be delivered without the RSA/ECC crypto library. In this case the TOE does not provide the Additional Specific Security Functionality Rivest-Shamir-Adleman Cryptography and Elliptic Curve Cryptography (ECC) and Secure Hash Algorithm (SHA). 1.2.3 TOE Features 19 CPU  16-bit SecuCalm core 20 Memory  40K-byte Program Memory (ROM)  8K-byte Test ROM  500Kbytes(S3FT9MH), 420Kbytes(S3FT9MV), 320Kbytes(S3FT9MG) Data/Program Memory (FLASH)  768 bytes Data Memory(FLASH)  9K-byte Data Memory (RAM)  5K-byte Crypto Memory (Crypto RAM) Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 22/105  1.25 K-bytes DMA RAM 21 FLASH Write Operations  Minimum 500,000 write/erase cycles  Data retention for minimum 25 years at 25°C 22 Triple DES  Built-in hardware Triple DES accelerator  Circuit for resistance against SPA, DPA and safe error attacks 23 AES  Built-in hardware AES accelerator  Circuit for resistance against SPA, DPA and safe error attacks  TORNADOTM-E  Built-in hardware accelerator for big number calculation 24 Abnormal Condition Detectors and Filters 25 Interrupts  Two interrupt sources and vectors (FIQ,IRQ)  Source for FIQ: Invalid memory access  Sources for IRQ:  SIO Falling edge  16-bit Timer  Watchdog Timer  Contact UART Tx/Rx  Contactless Type Tx/Rx  Software Interrupts 26 Serial I/O Interface  T=0 and 1 (ISO 7816-3)  Type A and Type B contactless interfaces compliant with the ISO 14443 standard 27 Reset and Power Down Mode Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 23/105 28 Random Number Generator  A Digital True random number generator (DTRNG FRO) : AIS31 PTG.2 class compliant (German Scheme)  A Bilateral Pseudo Random Number Generator (BPRNG): no compliance to any specific metric, but BPRNG is used by the chip for internal use 29 Memory Protection Unit The MPU allow the CPU to access memories through channels. Each channel can allow the access to a contiguous range of address. 30 Memory Encryption and Bus Scrambling 31 Timers  16-Bit Timer with 8 Bit prescaler  20-bit Watchdog Timer 32 ECC  ECC on Flash  7 parity bits for 32 information bits 33 CRC  32bit - CRC32 34 Clock Sources  External clock: 1 MHz–10 MHz  Internal clock: 12MHz-24MHz 35 Operating Voltage Range  1.62 V - 5.5 V 36 Operating Temperature  - 25°C to 85°C Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 24/105 37 Package  Wafer  8-pin COB (compliant with ISO 7816) 1.2.4 TOE Life cycle 38 The complex development and manufacturing processes of a Composite Product can be separated into seven distinct phases. The phases 2 and 3 of the Composite Product life cycle cover the IC development and production: Site / Building Phase Hwasung Plant Phase 2+3 Giheung Plant Phase 3 Onyang Plant Phase 3+4 PKL Plant Phase 3 HANAMICRON Plant Phase 3+4 Inesa Plant Phase 3+4 Eternal Plant Phase 3+4 TESNA Plant Phase 3 ASE Korea Phase 3+4  IC Development (Phase 2): – IC design, – IC Dedicated Software development, the IC Manufacturing (Phase 3): – integration and photomask fabrication, – IC production, – IC testing, – preparation and – Pre-personalisation if necessary 39 The Composite Product life cycle phase 4 can be included in the evaluation of the IC as an option:  the IC Packaging (Phase 4): – Security IC packaging (and testing), – Pre-personalisation if necessary. 40 In addition, three important stages have to be considered in the Composite Product life cycle:  Security IC Embedded Software Development (Phase 1),  the Composite Product finishing process, preparation and shipping to the personalisation line for the Composite Product (Composite Product Integration Phase 5), Package in Phase 5 Description Package 1 Loader dedicated for usage in Secured Environment only Package 2 Loader dedicated for usage by authorized users only  the Composite Product personalisation and testing stage where the User Data is loaded into the Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 25/105 Security IC's memory (Personalisation Phase 6),  the Composite Product usage by its issuers and consumers (Operational Usage Phase 7) which may include loading and other management of applications in the field. Device is in Test mode Device is in Normal mode Figure 2 Definition of “TOE Delivery” and responsible Parties 41 The Security IC Embedded Software is developed outside the TOE development in Phase 1. The TOE is developed in Phase 2 and produced in Phase 3. Then the TOE is delivered in form of wafers. The TOE can also be delivered in form of packaged products. In this case, the development and production of the TOE not only pertain to Phase 2 and 3 but to Phase 4 in addition. 1.3 Interfaces of the TOE  The physical interface of the TOE with the external environment is the entire surface of the IC  The electrical interface of the TOE with the external environment is made of the chip’s pads including the Vdd, RESETB, XCLK, GND, IO1, L1 and L2 as well as the contactless radio-frequency interface  The data interface of the TOE is made of the Contact I/O pads and Contactless I/O pads.  The software interface of the TOE with the hardware consists of Special Function Registers (SFR) and CPU instructions.  The TRNG interface of the TOE is defined by the DTRNG FRO and EHP DTRNG FRO libraries interface.  The RSA interface of the TOE is defined by the RSA/ECC library interface (optional).  The interface to the ECC and SHA calculations is defined from the RSA/ECC library interface (optional) 1.4 TOE Intended Usage 42 The TOE is dedicated to applications such as:  Banking and finance applications for credit or debit cards, electronic purse (stored value cards) and Public S3FT9MH_MV_MG ST Lite_Ver2.0 1 ST INTRODUCTION 26/105 electronic commerce.  Network based transaction processing such a mobile phones (GSM SIM cards), pay TV (subscriber and pay-per-view cards), communication highways (Internet access and transaction processing).  Transport and ticketing applications (access control cards).  Governmental cards (ID cards, health cards, driving licenses).  Multimedia applications and Digital Right Management protection. Public S3FT9MH_MV_MG ST Lite_Ver2.0 2 CONFORMANCE CLAIMS 27/105 2 CONFORMANCE CLAIMS 43 This chapter 2 contains the following sections: 2.1 CC Conformance Claim 2.2 PP Claim 2.3 Package Claim 2.4 Conformance Claim Rationale Public S3FT9MH_MV_MG ST Lite_Ver2.0 2 CONFORMANCE CLAIMS 28/105 2.1 CC Conformance Claim 44 This Security target claims to be conformant to the Common Criteria version 3.1 R4. 45 Furthermore it claims to be CC Part 2 extended and CC Part 3 conformant. The extended Security Functional Requirements are defined in chapter 5. 46 This Security Target has been built with the Common Criteria for Information Technology Security Evaluation; Version 3.1 which comprises [1] Common Criteria, Part 1: Common Criteria for Information Technology Security Evaluation, Part 1: Introduction and General Model, Version 3.1, Revision 4, Sept. 2012, CCMB-2012-09-001 [2] Common Criteria, Part 2: Common Criteria for Information Technology Security Evaluation, Part 2: Security Functional Components, Version 3.1, Revision 4, Sept. 2012, CCMB-2012-09-002 [3] Common Criteria, Part 3: Common Criteria for Information Technology Security Evaluation, Part 3: Security Assurance Components, Version 3.1, Revision 4, Sept. 2012, CCMB-2012-09-003 [4] Common Methodology for Information Technology Security Evaluation, Evaluation Methodology, Version 3.1, Revision 4, Sept. 2012, CCMB-2012-09-004 has been taken into account. 2.2 PP Claim 47 This Security Target is strictly compliant to the Security IC Platform Protection Profile [5]. The Security IC Platform Protection Profile is registered and certified by the Bundesamt für Sicherheit in der Informationstechnik (BSI) under the reference BSI-CC-PP-0084, Version 1.0, dated 01.2014. 48 This ST does not claim conformance to any other PP. 2.3 Package Claim 49 The assurance level for this Security Target is EAL6 augmented with ASE_TSS.2. 2.4 Conformance Claim Rationale 50 This security target claims strict conformance only to one PP, the Security IC Platform Protection Profile [5]. 51 The Evaluation Assurance Level (EAL) of the PP [5] is EAL 4 augmented with the assurance components ALC_DVS.2 and AVA_VAN.5. The Assurance Requirements of the TOE obtain the Evaluation Assurance Level 6 augmented with the assurance component ASE_TSS.2 for the TOE. 52 The Target of Evaluation (TOE) is a complete solution implementing a security integrated circuit (security IC) as defined in the PP [5] section 1.3.1, so the TOE is consistent with the TOE type in the PP [5]. 53 The security problem definition of this security target is consistent with the statement of the security problem definition in the PP [5], as the security target claimed strict conformance to the PP [5]. Additional threats, organisational security policies and assumptions are introduced in chapter 3 of this ST, a rationale is given in chapter 4.4. Public S3FT9MH_MV_MG ST Lite_Ver2.0 2 CONFORMANCE CLAIMS 29/105 54 The security objectives of this security target are consistent with the statement of the security objectives in the PP [5], as the security target claimed strict conformance to the PP [5]. Additional security objectives are added in chapter 4.1 of this ST, a rationale is given in chapter 4.4. 55 The security requirements of this security target are consistent with the statement of the security requirements in the PP [5], as the security target claimed strict conformance to the PP [5]. Additional security requirements are added in chapter 6.1 of this ST, a rationale is given in chapter 6.3. All assignments and selections of the security functional requirements are done in the PP [5] and in this security target section 6.1. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 30/105 3 SECURITY PROBLEM DEFINITION 56 This chapter 3 contains the following sections: 3.1 Description of Assets 3.2 Threats 3.3 Organizational Security Policies 3.4 Assumptions 3.1 Description of Assets Assets regarding the Threats 57 The assets (related to standard functionality) to be protected are  the User Data,  the Security IC Embedded Software stored and in operation,,  the security services provided by the TOE for the Security IC Embedded Software. 58 The user (consumer) of the TOE places value upon the assets related to high-level security concerns: SC1 integrity of User Data of the Composite TOE, SC2 confidentiality of User Data and of the Composite TOE being stored in the TOE’s protected memory areas, SC3 correct operation of the security services provided by the TOE for the Security IC Embedded Software. 59 The Security IC may not distinguish between User Data which are public known or kept confidential. Therefore the security IC shall protect the confidentiality and integrity of the User Data, unless the Security IC Embedded Software chooses to disclose or modify it. 60 In particular integrity of the Security IC Embedded Software means that it is correctly being executed which includes the correct operation of the TOE’s functionality. Though the Security IC Embedded Software (normally stored in the ROM) will in many cases not contain secret data or algorithms, it must be protected from being disclosed, since for instance knowledge of specific implementation details may assist an attacker. 61 The Protection Profile requires the TOE to provide one security service: the generation of random numbers by means of a physical Random Number Generator. The Security Target may require additional security services. It is essential that the TOE ensures the correct operation of all security services provided by the TOE for the Security IC Embedded Software. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 31/105 62 According to the Protection Profile there is the following high-level security concern related to security service: SC4 deficiency of random numbers. 63 To be able to protect these assets the TOE shall protect its security functionality. Therefore critical information about the TOE shall be protected. Critical information includes:  logical design data, physical design data, IC Dedicated Software, and configuration data,  Initialisation Data and Pre-personalisation Data, specific development aids, test and characterisation related data, material for software development support, and photomasks. 64 Such information and the ability to perform manipulations assist in threatening the above assets. 65 Note that there are many ways to manipulate or disclose the User Data: (i) An attacker may manipulate the Security IC Embedded Software or the TOE. (ii) An attacker may cause malfunctions of the TOE or abuse Test Features provided by the TOE. Such attacks usually require design information of the TOE to be obtained. They pertain to all information about (i) the circuitry of the IC (hardware including the physical memories), (ii) the IC Dedicated Software with the parts IC Dedicated Test Software (if any) and IC Dedicated Support Software (if any), and (iii) the configuration data for the security functionality. The knowledge of this information enables or supports attacks on the assets. Therefore the TOE Manufacturer must ensure that the development and production of the TOE is secure so that no information is unintentionally made available for the operational phase of the TOE. 66 The TOE Manufacturer must apply protection to support the security of the TOE. This not only pertains to the TOE but also to all information and material exchanged with the developer of the Security IC Embedded Software. This covers the Security IC Embedded Software itself if provided by the developer of the Security IC Embedded Software or any authentication data required to enable the download of software. This includes the delivery (exchange) procedures for Phase 1 and the Phases after TOE Delivery as far as they can be controlled by the TOE Manufacturer. These aspects enforce the usage of the supporting documents and the refinements of SAR defined in the protection profile. 67 The information and material produced and/or processed by the TOE Manufacturer in the TOE development and production environment (Phases 2 up to TOE Delivery) can be grouped as follows: ● logical design data, ● physical design data, ● IC Dedicated Software, Initialisation Data and Pre-personalisation Data, ● Security IC Embedded Software, provided by the Security IC Embedded Software developer and implemented by the IC manufacturer, ● specific development aids, ● test and characterisation related data, ● material for software development support, and ● photomasks and products in any form as long as they are generated, stored, or processed by the TOE Manufacturer. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 32/105 3.2 Threats 68 The following explanations help to understand the focus of the threats and objectives defined below. For example, certain attacks are only one step towards a disclosure of assets, others may directly lead to a compromise of the application security.  Manipulation of user data (which includes user data and code of the Composite TOE, stored in or processed by the Security IC) means that an attacker is able to alter a meaningful block of data. This should be considered for the threats T.Malfunction, T.Phys-Manipulation and T.Abuse-Func  Disclosure of user data (which may include user data and code of the Composite TOE, stored in protected memory areas or processed by the Security IC) or TSF data means that an attacker is realistically able to determine a meaningful block of data. This should be considered for the threats T.Leak-Inherent, T.Phys-Probing, T.Leak-Forced and T.Abuse-Func.  Manipulation of the TSF or TSF data means that an attacker is able to deliberately deactivate or otherwise change the behaviour of a specific security functionality in a manner which enables exploitation. This should be considered for the threat T.Malfunction, T.Phys-Manipulation and T.Abuse- Func. 69 The cloning of the functional behaviour of the Security IC on its physical and command interface is the highest level security concern in the application context. 70 The cloning of that functional behaviour requires to (i) develop a functional equivalent of the Security IC Embedded Software, (ii) disclose, interpret and employ the secret User Data stored in the TOE, and (iii) develop and build a functional equivalent of the Security IC using the input from the previous steps. 71 The Security IC is a platform for the Security IC Embedded Software which ensures that especially the critical User Data are stored and processed in a secure way (refer to below). The Security IC Embedded Software must also ensure that critical User Data are treated as required in the application context. In addition, the personalisation process supported by the Security IC Embedded Software (and perhaps by the Security IC in addition) must be secure. This last step is beyond the scope of the Protection Profile. As a result the threat ―cloning of the functional behaviour of the Security IC on its physical and command interface‖ is averted by the combination of measures which split into those being evaluated according to the Protection Profile (Security IC) and those being subject to the evaluation of the Security IC Embedded Software or Security IC and the corresponding personalisation process. Therefore, functional cloning is indirectly covered by the security concerns and threats described below. 72 The high-level security concerns are refined below by defining threats as required by the Common Criteria (refer to Figure 3). Note that manipulation of the TOE is only a means to threaten User Data or the Security IC Embedded Software and is not a success for the attacker in itself. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 33/105 Figure 3 Standard Threats 73 The high-level security concern related to security service is refined below by defining threats as required by the Common Criteria (refer to Figure 4). T.RND T.Mem- Access T.Masquerade_TOE Figure 4 Threats related to security service 74 The Security IC Embedded Software must contribute to averting the threats: At least it must not undermine the security provided by the TOE. 75 The above security concerns are derived from considering the end-usage phase (Phase 7) since  Phase 1 and the Phases from TOE Delivery up to the end of Phase 6 are covered by assumptions and  the development and production environment starting with Phase 2 up to TOE Delivery are covered by an organisational security policy. 76 The TOE’s countermeasures are designed to avert the threats described below. Nevertheless, they may be effective in earlier phases (Phases 4 to 6). 77 The TOE is exposed to different types of influences or interactions with its outer world. Some of them may result from using the TOE only but others may also indicate an attack. The different types of influences or interactions are visualised in Figure 5. Due to the intended usage of the TOE all interactions are considered as possible. T.Malfunction T.Phys-Probing T.Leak-Forced T.Abuse-Func T.Phys-Manipulation T.Leak-Inherent Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 34/105 Figure 5 Interactions between the TOE and its outer world 78 An interaction with the TOE can be done through the physical interfaces (Number 7 – 9 in Figure 5) which are realised using contacts interface. Influences or interactions with the TOE also occur through the chip surface (Number 1 – 6 in Figure 5). In Number 1 and 6 galvanic contacts are used. In Number 2 and 5 the influence (arrow directed to the chip) or the measurement (arrow starts from the chip) does not require a contact. Number 3 and 4 refer to specific situations where the TOE and its functional behaviour is not only influenced but definite changes are made by applying mechanical, chemical and other methods (such as 1, 2). Many attacks require a prior inspection and some reverse-engineering (Number 3). This demonstrates the basic building blocks of attacks. A practical attack will use a combination of these elements. 3.2.1 Standard Threats 79 The TOE shall avert the threat ―Inherent Information Leakage (T.Leak-Inherent)‖ as specified below. T.Leak-Inherent Inherent Information Leakage An attacker may exploit information which is leaked from the TOE during usage of the Security IC in order to disclose confidential data as part of the assets. 80 No direct contact with the Security IC internals is required here. Leakage may occur through emanations, variations in power consumption, I/O characteristics, clock frequency, or by changes in processing time requirements. One example is the Differential Power Analysis (DPA). This leakage may be interpreted as a covert channel transmission but is more closely related to measurement of operating parameters, which may be derived either from direct (contact) measurements (Numbers 6 and 7 in Figure 5) or measurement of emanations (Number 5 in Figure 5) and can then be related to the specific operation being performed. 81 The TOE shall avert the threat ―Physical Probing (T.Phys-Probing)‖ as specified below. T.Phys-Probing Physical Probing Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 35/105 An attacker may perform physical probing of the TOE in order (i) to disclose User Data, (ii) to disclose/reconstruct the Security IC Embedded Software or (iii) to disclose other critical information about the operation of the TOE to enable attacks disclosing or manipulating the User Data or the Security IC Embedded Software. 82 Physical probing requires direct interaction with the Security IC internals (Numbers 5 and 6 in Figure 5). Techniques commonly employed in IC failure analysis and IC reverse engineering efforts may be used. Before that hardware security mechanisms and layout characteristics need to be identified (Number 3 in Figure 5). Determination of software design including treatment of User Data may also be a pre-requisite. 83 This pertains to ―measurements‖ using galvanic contacts or any type of charge interaction whereas manipulations are considered under the threat ―Physical Manipulation (T.Phys-Manipulation)‖. The threats ―Inherent Information Leakage (T.Leak-Inherent)‖ and ―Forced Information Leakage (T.Leak-Forced)― may use physical probing but require complex signal processing in addition. 84 The TOE shall avert the threat ―Malfunction due to Environmental Stress (T.Malfunction)‖ as specified below. T.Malfunction Malfunction due to Environmental Stress An attacker may cause a malfunction of TSF or of the Security IC Embedded Software by applying environmental stress in order to (i) modify security services of the TOE or (ii) modify functions of the Security IC Embedded Software (iii) deactivate or affect security mechanisms of the TOE to enable attacks disclosing or manipulating the User Data or the Security IC Embedded Software. This may be achieved by operating the Security IC outside the normal operating conditions (Numbers 1, 2 and 9 in Figure 5). 85 The modification of security services of the TOE may e.g. affect the quality of random numbers provided by the random number generator up to undetected deactivation when the random number generator does not produce random numbers and the Security IC Embedded Software gets constant values. In another case errors are introduced in executing the Security IC Embedded Software. To exploit an attacker needs information about the functional operation, e.g. to introduce a temporary failure within a register used by the Security IC Embedded Software with light or a power glitch. 86 The TOE shall avert the threat ―Physical Manipulation (T.Phys-Manipulation)‖ as specified below. T.Phys-Manipulation Physical Manipulation An attacker may physically modify the Security IC in order to (i) modify User Data, (ii) modify the Security IC Embedded Software, (iii) modify or deactivate security services of the TOE, or (iv) modify security mechanisms of the TOE to enable attacks disclosing or manipulating the User Data or the Security IC Embedded Software. 87 The modification may be achieved through techniques commonly employed in IC failure analysis (Numbers 1, 2 and 4 in Figure 5) and IC reverse engineering efforts (Number 3 in Figure 5). The modification may result in the deactivation of a security feature. Before that hardware security mechanisms and layout characteristics need to be identified. Determination of software design including treatment of User Data may also be a pre-requisite. Changes of circuitry or data can be permanent or temporary. 88 In contrast to malfunctions (refer to T.Malfunction) the attacker requires gathering significant knowledge about the TOE’s internal construction here (Number 3 in Figure 5). Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 36/105 89 The TOE shall avert the threat ―Forced Information Leakage (T.Leak-Forced)― as specified below: T.Leak-Forced Forced Information Leakage An attacker may exploit information which is leaked from the TOE during usage of the Security IC in order to disclose confidential data as part of the assets even if the information leakage is not inherent but caused by the attacker. 90 This threat pertains to attacks where methods described in ―Malfunction due to Environmental Stress‖ (refer to T.Malfunction) and/or ―Physical Manipulation‖ (refer to T.Phys-Manipulation) are used to cause leakage from signals (Numbers 5, 6, 7 and 8 in Figure 5) which normally do not contain significant information about secrets. 91 The TOE shall avert the threat ―Abuse of Functionality (T.Abuse-Func)‖ as specified below. T.Abuse-Func Abuse of Functionality An attacker may use functions of the TOE which may not be used after TOE Delivery in order to (i) disclose or manipulate User Data, (ii) manipulate (explore, bypass, deactivate or change) security services of the TOE or (iii) manipulate (explore, bypass, deactivate or change) functions of the Security IC Embedded Software or (iv) enable an attack disclosing or manipulating the User Data or the Security IC Embedded Software. 3.2.2 Threats related to security services 92 The TOE shall avert the threat ―Deficiency of Random Numbers (T.RND)‖ as specified below. T.RND Deficiency of Random Numbers An attacker may predict or obtain information about random numbers generated by the TOE for instance because of a lack of entropy of the random numbers provided. An attacker may gather information about the produced random numbers which might be a problem because they may be used for instance to generate cryptographic keys. Here the attacker is expected to take advantage of statistical properties of the random numbers generated by the TOE without specific knowledge about the TOE’s generator. Malfunctions or premature ageing are also considered which may assist in getting information about random numbers. 3.2.3 Threats related to additional TOE Specific Functionality 93 The TOE shall avert the additional threat ―Memory Access Violation (T.Mem-Access)‖ as specified below. T.Mem-Access Memory Access Violation Parts of the IC Smartcard Embedded Software may cause security violations by accidentally or deliberately accessing restricted data (which may include code). Any restrictions are defined by the security policy of the specific application context and must be implemented by the Smartcard IC Embedded Software. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 37/105 Clarification: This threat does not address the proper definition and management of the security rules implemented by the Security IC Embedded Software, this being software design and correctness issue.This threat addresses the reliability of the abstract machine targeted by the software implementation. To avert the threat, the set of access rules provided by this TOE should be undefeated if operated according to the provided guidance. The threat is not realized if the Security IC Embedded Software is designed or implemented to grant access to restricted information. It is realized if an implemented access denial is granted under unexpected conditions or if the execution machinery does not effectively control a controlled access. Here the attacker is expected to (i) take advantage of flaws in the design and/or the implementation of the TOE memory access rules (refer to T.Abuse-Func but for functions available after TOE delivery), (ii) introduce flaws by forcing operational conditions (refer to T.Malfunction) and/or by physical manipulation (refer to T.Phys-Manipulation). This attacker is expected to have a high level potential of attack. 3.2.4 Threats related to Authentication of the Security IC The TOE shall avert the threat ―Masquerade the TOE (T. Masquerade_TOE)‖ as specified below. T.Masquerade_TOE Masquerade the TOE An attacker may threaten the property being a genuine TOE by producing a chip which is not a genuine TOE but wrongly identifying itself as genuine TOE sample. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 38/105 3.3 Organizational Security Policies 94 The following Figure 6 shows the policies applied in this Security Target. P.Process- TOE P.Crypto- Service P.Lim_Block_Lo ader P.Ctlr_Loader Figure 6 Policies 95 The IC Developer / Manufacturer must apply the policy ―Protection during TOE Development and Production (P.Process-TOE)‖ as specified below. P.Process-TOE Protection during TOE Development and Production An accurate identification must be established for the TOE. This requires that each instantiation of the TOE carries this unique identification. 96 The accurate identification is introduced at the end of the production test in phase 3. Therefore the production environment must support this unique identification. 97 The information and material produced and/or processed by the TOE Manufacturer in the TOE development and production environment (Phases 2 up to TOE Delivery) can be grouped as follows:  logical design data,  physical design data,  IC Dedicated Software, Security IC Embedded Software, Initialisation Data and Pre-personalisation Data,  specific development aids,  test and characterisation related data,  material for software development support, and  photomasks and products in any form as long as they are generated, stored, or processed by the TOE Manufacturer. 98 The TOE provides specific cryptographic services which can be used by the Smartcard Embedded Software. In the following specific cryptographic services are listed which is not derived from threats identified for the TOE’s environment because it can only be decided in the context of the smartcard applications, against which threats the Smartcard Embedded Software will use the specific cryptographic service. The IC Developer / Manufacturer must apply the policy ―Cryptographic Service (P.Crypto-Service)‖ as specified below. P.Crypto-Service Cryptographic Services provided by the TOE The TOE shall provide the following cryptographic services to the IC Embedded Software:  Triple Data Encryption Standard (TDES) Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 39/105  Advanced Encryption Standard (AES)  Rivest-Shamir-Adleman (RSA) public key asymmetric cryptography (optional)  Elliptic Curve Cryptography (ECC) (optional)  Secure Hash Algorithm (SHA) (optional) Note: The TOE can be delivered without the RSA/ECC crypto library. In this case the TOE does not provide the Additional Specific Security Functionality Rivest-Shamir-Adleman Cryptography and Elliptic Curve Cryptography (ECC) and Secure Hash Algorithm (SHA). The IC Developer / Manufacturer must apply the organisational security policy ―Limiting and Blocking the Loader Functionality (P.Lim_Block_Loader)‖ applies to Loader dedicated for usage in secured environment specified below. P.Lim_Block_Loader Limiting and Blocking the Loader Functionality The composite manufacturer uses the Loader for loading of Security IC Embedded Software, user data of the Composite Product or IC Dedicated Support Software in charge of the IC Manufacturer. He limits the capability and blocks the availability of the Loader in order to protect stored data from disclosure and manipulation. The organizational security policy ―Controlled usage to Loader Functionality (P.Ctlr_Loader)‖ applies to Loader dedicated for usage by authorized users only. P.Ctlr_Loader Controlled usage to Loader Functionality Authorized user controls the usage of the Loader functionality in order to protect stored and loaded user data from disclosure and manipulation. Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 40/105 3.4 Assumptions 99 The following Figure 7 shows the assumptions applied in this Security Target. A.Process-Sec-IC A.Key-Function A.Resp-Appl Figure 7 Assumptions 100 The intended usage of the TOE is twofold, depending on the Life Cycle Phase: (i) The Security IC Embedded Software developer use it as a platform for the Security IC software being developed. The Composite Product Manufacturer (and the consumer) uses it as a part of the Security IC. The Composite Product is used in a terminal which supplies the Security IC (with power and clock) and (at least) mediates the communication with the Security IC Embedded Software. 101 Before being delivered to the consumer the TOE is packaged. Many attacks require the TOE to be removed from the carrier. Though this extra step adds difficulties for the attacker no specific assumptions are made here regarding the package. 102 Appropriate ―Protection during Packaging, Finishing and Personalisation (A.Process-Sec-IC)‖ must be ensured after TOE Delivery up to the end of Phase 6, as well as during the delivery to Phase 7 as specified below. A.Process-Sec-IC Protection during Packaging, Finishing and Personalisation It is assumed that security procedures are used after delivery of the TOE by the TOE Manufacturer up to delivery to the consumer to maintain confidentiality and integrity of the TOE and of its manufacturing and test data (to prevent any possible copy, modification, retention, theft or unauthorised use). This means that the Phases after TOE Delivery are assumed to be protected appropriately. 103 The information and material produced and/or processed by the Security IC Embedded Software Developer in Phase 1 and by the Composite Product Manufacturer can be grouped as follows:  the Security IC Embedded Software including specifications, implementation and related documentation,  pre-personalisation and personalisation data including specifications of formats and memory areas, test related data,  the User Data and related documentation, and  material for software development support 104 as long as they are not under the control of the TOE Manufacturer. Details must be defined in the Protection Profile or Security Target for the evaluation of the Security IC Embedded Software and/or Security IC. 105 The developer of the Security IC Embedded Software must ensure the appropriate ―Treatment of User Data (A.Resp-Appl)‖ while developing this software in Phase 1 as specified below. A.Resp-Appl Treatment of User Data Public S3FT9MH_MV_MG ST Lite_Ver2.0 3 SECURITY PROBLEM DEFINITION 41/105 All User Data are owned by Security IC Embedded Software. Therefore, it must be assumed that security relevant User Data (especially cryptographic keys) are treated by the Security IC Embedded Software as defined for its specific application context. 106 The application context specifies how the User Data shall be handled and protected. The evaluation of the Security IC according to this Security Target is conducted on generalized application context. The concrete requirements for the Security IC Embedded Software shall be defined in the Protection Profile respective Security Target for the Security IC Embedded Software. The Security IC cannot prevent any compromise or modification of User Data by malicious Security IC Embedded Software. The assumption A.Resp-Appl ensures that the Security IC Embedded Software follows the security rules of the application context. 107 The developer of the Smartcard Embedded Software must ensure the appropriate ―Usage of Key- dependent Functions (A.Key-Function)‖ while developing this software in Phase 1 as specified below. A.Key-Function Usage of Key-dependent Functions Key-dependent functions (if any) shall be implemented in the Smartcard Embedded Software in a way that they are not susceptible to leakage attacks (as described under T.Leak-Inherent and T.Leak-Forced). 108 Note that here the routines which may compromise keys when being executed are part of the Smartcard Embedded Software. In contrast to this the threats T.Leak-Inherent and T.Leak-Forced address (i) the cryptographic routines which are part of the TOE and (ii) the processing of User Data including cryptographic keys. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 42/105 4 SECURITY OBJECTIVES 109 This chapter Security Objectives contains the following sections: 4.1 Security Objectives for the TOE 4.2 Security Objectives for the IC Embedded Software development Environment 4.3 Security Objectives for the operational Environment 4.4 Security Objectives Rationale Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 43/105 4.1 Security Objectives for the TOE 110 The user have the following standard high-level security goals related to the assets: SG1 maintain the integrity of user data (when being executed/processed and when being stored in the TOE’s memories) as well as SG2 maintain the confidentiality of user data (when being processed and when being stored in the TOE’s protected memories). SG3 maintain the correct operation of the security services provided by the TOE for the Security IC Embedded Software. SG4 provide random numbers. 111 Note, the Security IC may not distinguish between user data which are public known or kept confidential. Therefore the security IC shall protect the user data in integrity and in confidentiality if stored in protected memory areas, unless the Security IC Embedded Software chooses to disclose or modify it. Parts of the Security IC Embedded Software which do not contain secret data or security critical source code, may not require protection from being disclosed. Other parts of the Security IC Embedded Software may need kept confidential since specific implementation details may assist an attacker. 112 These standard high-level security goals in the context of the security problem definition build the starting point for the definition of security objectives as required by the Common Criteria (refer to Figure 8). Note that the integrity of the TOE is a means to reach these objectives. O.Abuse_Func O.Leak-Forced O.Identification O.Leak-Inherent O.Malfunction O.Phys-Probing O.Phys-Manipulation Figure 8 Standard Security Objectives 113 According to this Protection Profile there is the following high-level security goal related to specific functionality: Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 44/105 114 The additional high-level security considerations are refined below by defining security objectives as required by the Common Criteria (refer to Figure 9). Figure 9 Security Objectives related to Specific Functionality 4.1.1 Standard Security Objectives 115 The TOE shall provide ―Protection against Inherent Information Leakage (O.Leak-Inherent)‖ as specified below. O.Leak-Inherent Protection against Inherent Information Leakage The TOE must provide protection against disclosure of confidential data (User Data or TSF data) stored and/or processed in the Smartcard IC ● by measurement and analysis of the shape and amplitude of signals (for example on the power, clock, or I/O lines) and ● by measurement and analysis of the time between events found by measuring signals (for instance on the power, clock, or I/O lines). This objective pertains to measurements with subsequent complex signal processing whereas O.Phys-Probing is about direct measurements on elements O.Cap_Avail_Loader O.Ctrl_Auth_Loader O.RND OE.TOE_Auth O.AES O.RSA O.ECC O.SHA O.Mem-Access O.Authentication O.TDES OE.Process-Sec-IC OE.Lim_Block_Loader OE.Loader_Usage OE.Resp-Appl Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 45/105 on the chip surface. Details correspond to an analysis of attack scenarios which is not given here. 116 The TOE shall provide ―Protection against Physical Probing (O.Phys-Probing)‖ as specified below. O.Phys-Probing Protection against Physical Probing The TOE must provide protection against disclosure of User Data, against the disclosure/reconstruction of the Smartcard Embedded Software or against the disclosure of other critical operational information. This includes protection against measuring through galvanic contacts which is direct physical probing on the chips surface except on pads being bonded (using standard tools for measuring voltage and current) or ● measuring not using galvanic contacts but other types of physical interaction between charges (using tools used in solid-state physics research and IC failure analysis) with a prior ● reverse-engineering to understand the design and its properties and functions. The TOE must be designed and fabricated so that it requires a high combination of complex equipment, knowledge, skill, and time to be able to derive detailed design information or other information which could be used to compromise security through such a physical attack. 117 The TOE shall provide ―Protection against Malfunctions (O.Malfunction)‖ as specified below. O.Malfunction Protection against Malfunctions The TOE must ensure its correct operation. The TOE must prevent its operation outside the normal operating conditions where reliability and secure operation has not been proven or tested. This is to prevent errors. The environmental conditions may include voltage, clock frequency, temperature, or external energy fields. Remark: A malfunction of the TOE may also be caused using a direct interaction with elements on the chip surface. This is considered as being a manipulation (refer to the objective O.Phys-Manipulation) provided that detailed knowledge about the TOE´s internal construction is required and the attack is performed in a controlled manner. 118 The TOE shall provide ―Protection against Physical Manipulation (O.Phys-Manipulation)‖ as specified below. O.Phys-Manipulation Protection against Physical Manipulation The TOE must provide protection against manipulation of the TOE (including its software and TSF data), the Smartcard Embedded Software and the User Data. This includes protection against Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 46/105 ● reverse-engineering (understanding the design and its properties and functions), ● manipulation of the hardware and any data, as well as ● controlled manipulation of memory contents (User Data). The TOE must be designed and fabricated so that it requires a high combination of complex equipment, knowledge, skill, and time to be able to derive detailed design information or other information which could be used to compromise security through such a physical attack. 119 The TOE shall provide ―Protection against Forced Information Leakage (O.Leak-Forced)― as specified below: O.Leak-Forced Protection against Forced Information Leakage The Security IC must be protected against disclosure of confidential data processed in the Security IC (using methods as described under O.Leak-Inherent) even if the information leakage is not inherent but caused by the attacker ● by forcing a malfunction (refer to ―Protection against Malfunction due to Environmental Stress (O.Malfunction)‖ and/or ● by a physical manipulation (refer to ―Protection against Physical Manipulation (O.Phys-Manipulation)‖. If this is not the case, signals which normally do not contain significant information about secrets could become an information channel for a leakage attack. 120 The TOE shall provide ―Protection against Abuse of Functionality (O.Abuse-Func)‖ as specified below. O.Abuse-Func Protection against Abuse of Functionality The TOE must prevent that functions of the TOE which may not be used after TOE Delivery can be abused in order (i) to disclose critical User Data, (ii) to manipulate critical User Data of the Smartcard Embedded Software, (iii) to manipulate Soft-coded Smartcard Embedded Software or (iv) bypass, deactivate, change or explore security features or functions of the TOE. Details depend, for instance, on the capabilities of the Test Features provided by the IC Dedicated Test Software which are not specified here. 121 The TOE shall provide ―TOE Identification (O.Identification)― as specified below: O.Identification TOE Identification The TOE must provide means to store Initialisation Data and Pre-personalisation Data in its non-volatile memory. The Initialisation Data (or parts of them) are used for TOE identification. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 47/105 4.1.2 Security Objectives related to Specific Functionality (referring to SC4) 122 The TOE shall provide ―Random Numbers (O.RND)‖ as specified below. O.RND Random Numbers The TOE will ensure the cryptographic quality of random number generation. For instance random numbers shall not be predictable and shall have sufficient entropy. The TOE will ensure that no information about the produced random numbers is available to an attacker since they might be used for instance to generate cryptographic keys. 4.1.3 Security Objectives for Added Function 123 The TOE shall provide ―Area based Memory Access Control (O.Mem-Access)‖ as specified below. O.Mem-Access Area based Memory Access Control The TOE must provide the Smartcard Embedded Software with the capability to define restricted access memory areas. The TOE must then enforce the partitioning of such memory areas so that access of software to memory areas is controlled as required, for example, in a multi-application environment. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 48/105 4.2 Security Objectives for the Security IC Embedded Software Development Environment. 124 The development of the Security IC Embedded Software is outside the development and manufacturing of the TOE. The Security IC Embedded Software defines the operational use of the TOE. This section describes the security objectives for the operational environment enforced by the Security IC Embedded software. 125 The Security IC Embedded Software shall provide ―Treatment of User Data (OE.Resp-Appl)‖ as specified below. OE.Resp-Appl Treatment of user data of the Composite TOE Security relevant user data of the Composite TOE (especially cryptographic keys) are treated by the Security IC Embedded Software as required by the security needs of the specific application context. For example the Security IC Embedded Software will not disclose security relevant user data of the Composite TOE to unauthorised users or processes when communicating with a terminal. The Security IC Embedded Software shall provide ―Authentication to external entities (O.Authentication)‖ as specified below. O. Authentication Authentication to external entities The TOE shall be able to authenticate itself to external entities. The Initialisation Data (or parts of them) are used for TOE authentication verification data. 4.2.1 Clarification of “Treatment of User Data (OE.Resp-Appl)” 126 Regarding the cryptographic services this objective of the environment has to be clarified. By definition cipher or plain text data and cryptographic keys are User Data. The Smartcard Embedded Software shall treat these data appropriately, use only proper secret keys (chosen from a large key space) as input for the cryptographic function of the TOE and use keys and functions appropriately in order to ensure the strength of cryptographic operation. 127 This means that keys are treated as confidential as soon as they are generated. The keys must be unique with a very high probability, as well as cryptographically strong. If keys are imported into the TOE and/or derived from other keys, quality and confidentiality must be maintained. This implies that appropriate key management has to be realised in the environment. 128 Regarding the area based access control this objective of the environment has to be clarified. The treatment of User Data is also required when a multi-application operating system is implemented as part of the Smartcard Embedded Software on the TOE. In this case the multi-application operating system should not disclose security relevant user data of one application to another application when it is processed or stored on the TOE. 129 The treatment of User Data is still required when a multi-application operating system is implemented as part of the Smartcard Embedded Software on the TOE. In this case the multi-application operating system should not disclose security relevant user data of one application to another application when it is processed or stored on the TOE. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 49/105 4.3 Security Objectives for the Operational Environment TOE Delivery up to the End of Phase 6 130 Appropriate ―Protection during Packaging, Finishing and Personalisation (OE.Process-Sec-IC)‖ must be ensured after TOE Delivery up to the end of Phases 6, as well as during the delivery to Phase 7 as specified below. OE.Process-Sec-IC Protection during composite product manufacturing Security procedures shall be used after TOE Delivery up to delivery to the "consumer" to maintain confidentiality and integrity of the TOE and of its manufacturing and test data (to prevent any possible copy, modification, retention, theft or unauthorised use). This means that Phases after TOE Delivery up to the end of Phase 6 must be protected appropriately. The operational environment of the TOE shall provide ―Limitation of capability and blocking the Loader (OE.Lim_Block_Loader)‖ as specified below. OE.Lim_Block_Loader Limitation of capability and blocking the Loader The Composite Product Manufacturer will protect the Loader functionality against misuse, limit the capability of the Loader and terminate irreversibly the Loader after intended usage of the Loader. The operational environment of the TOE shall provide “Secure communication and usage of the Loader (OE.Loader_Usage)” as specified below. OE.Loader_Usage Secure communication and usage of the Loader The authorized user must support the trusted communication channel with the TOE by confidentiality protection and authenticity proof of the data to be loaded and fulfilling the access conditions required by the Loader The operational environment shall provide ―External entities authenticating of the TOE (OE.TOE_Auth)‖. OE.TOE_Auth External entities authenticating of the TOE The operational environment shall support the authentication verification mechanism and know authentication reference data of the TOE. 4.3.1 Clarification of “Protection during Composite Product Manufacturing (OE.Process-Sec-IC)” 131 The protection during packaging, finishing and personalization includes also the personalization process and the personalization data during Phase 4, Phase 5 and Phase 6. 132 Since OE.Process-Sec-IC requires the Composite Product Manufacturer to implement those measures assumed in A.Process-Sec-IC, the assumption is covered by this objective. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 50/105 4.4 Security Objectives Rationale 133 Table 4 below gives an overview, how the assumptions, threats, and organisational security policies are addressed by the objectives. The text following after the table justifies this in detail. Assumption, Threat or Organisational Security Policy Security Objective Notes A.Resp-Appl OE.Resp-Appl Phase 1 P.Process-TOE O.Identification Phase 2 – 3 optional Phase 4 A.Process-Sec-IC OE.Process-Sec-IC Phase 5 – 6 optional Phase 4 T.Leak-Inherent O.Leak-Inherent T.Phys-Probing O.Phys-Probing T.Malfunction O.Malfunction T.Phys-Manipulation O.Phys-Manipulation T.Leak-Forced O.Leak-Forced T.Abuse-Func O.Abuse-Func T.RND O.RND T.Mem-Access O.Mem-Access P.Crypto-Service O.TDES O.AES O.RSA O.ECC O.SHA A.Key-Function OE.Resp-Appl P.Lim_Block_Loader O.Cap_Avail_Loader OE.Lim_Block_Loader Phase 5 P.Ctlr_Loader O.Ctrl_Auth_Loader OE.Loader_Usage Phase 5 T.Masquerade_TOE O.Authentication OE.TOE_Auth Table 4 Security Objectives versus Assumptions, Threats or Policies 134 The justification related to the assumption ―Treatment of User Data (A.Resp-Appl)‖ is as follows: 135 Since OE.Resp-Appl requires the developer of the Smartcard Embedded Software to implement measures as assumed in A.Resp-Appl, the assumption is covered by the objective. Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 51/105 136 The justification related to the organisational security policy ―Protection during TOE Development and Production (P.Process-TOE)‖ is as follows: 137 O.Identification requires that the TOE has to support the possibility of a unique identification. The unique identification can be stored on the TOE. Since the unique identification is generated by the production environment the production environment must support the integrity of the generated unique identification. The technical and organisational security measures that ensure the security of the development environment and production environment are evaluated based on the assurance measures that are part of the evaluation. For a list of material produced and processed by the TOE Manufacturer refer to paragraph 44. All listed items and the associated development and production environments are subject of the evaluation. Therefore, the organisational security policy P.Process-TOE is covered by this objective, as far as organisational measures are concerned. 138 The justification related to the assumption ―Protection during Packaging, Finishing and Personalisation (A.Process-Sec-IC)‖ is as follows: 139 Since OE.Process-Sec-IC requires the Composite Product Manufacturer to implement those measures assumed in A.Process-Sec-IC, the assumption is covered by this objective. 140 The justification related to the threats ―Inherent Information Leakage (T.Leak-Inherent)‖, ―Physical Probing (T.Phys-Probing)‖, ―Malfunction due to Environmental Stress (T.Malfunction)‖, ―Physical Manipulation (T.Phys-Manipulation)‖, ―Forced Information Leakage (T.Leak-Forced)―, ―Abuse of Functionality (T.Abuse- Func)‖ and ―Deficiency of Random Numbers (T.RND)‖ is as follows: 141 For all threats the corresponding objectives are stated in a way, which directly corresponds to the description of the threat. It is clear from the description of each objective, that the corresponding threat is removed if the objective is valid. More specifically, in every case the ability to use the attack method successfully is countered, if the objective holds. 142 The justification related to the threat ―Memory Access Violation (T.Mem-Access)‖ is as follows: 143 According to O.Mem-Access the TOE must enforce the partitioning of memory areas so that access of software to memory areas is controlled. Any restrictions are to be defined by the Smartcard Embedded Software. Thereby security violations caused by accidental or deliberate access to restricted data (which may include code) can be prevented (refer to T.Mem-Access). The threat T.Mem-Access is therefore removed if the objective is met. 144 The clarification of O.Mem-Access makes clear that it is up to the Smartcard Embedded Software to implement the memory management scheme by appropriately administrating the TSF. The TOE shall provide access control functions as a means to be used by the Smartcard Embedded Software. This is further emphasised by the clarification of Treatment of User Data (OE.Resp-Appl) which reminds that the Smartcard Embedded Software must not undermine the restrictions it defines. Therefore, the clarifications contribute to the coverage of the threat T.Mem-Access. . 145 Compared to Smartcard IC Platform Protection Profile a clarification has been made for the security objective ―Treatment of User Data (OE.Resp-Appl)‖: By definition cipher or plain text data and cryptographic keys are User Data. So, the Smartcard Embedded Software will protect such data if required and use keys and functions appropriately in order to ensure the strength of cryptographic operation. Quality and confidentiality must be maintained for keys that are imported and/or derived from other keys. This implies that appropriate key management has to be realised in the environment. That is expressed by the assumption A.Key—Function which is covered from OE.Resp–Appl. These measures make sure that the assumption A.Resp-Appl is still covered by the security objective OE.Resp-Appl. 146 The organisational security policy Limitation of capability and blocking the Loader (P.Lim_Block_Loader) is Public S3FT9MH_MV_MG ST Lite_Ver2.0 4 SECURITY OBJECTIVES 52/105 directly implemented by the security objective for the TOE ―Capability and availability of the Loader (O.Cap_Avail_Loader)‖ and the security objective for the TOE environment ―Limitation of capability and blocking the Loader (OE.Lim_Block_Loader)‖. The TOE security objective ―Capability and availability of the Loader‖ (O.Cap_Avail_Loader)‖ mitigates also the threat ―Abuse of Functionality ― (T.Abuse-Func) if attacker tries to misuse the Loader functionality in order to manipulate security services of the TOE provided or depending on IC Dedicated Support Software or user data of the TOE as IC Embedded Software, TSF data or user data of the smartcard product. 147 The organisational security policy ―Controlled usage to Loader Functionality (P.Ctlr_Loader) is directly implemented by the security objective for the TOE ―Access control and authenticity for the Loader (O.Ctrl_Auth_Loader)‖ and the security objective for the TOE environment ―Secure communication and usage of the Loader (OE.Loader_Usage)‖. 148 The threat ―Masquerade the TOE (T.Masquerade_TOE)‖ is directly covered by the TOE security objective ―Authentication to external entities (O.Authentication)‖ describing the proving part of the authentication and the security objective for the operational environment of the TOE ―External entities authenticating of the TOE (OE.TOE_Auth)‖ the verifying part of the authentication. Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 53/105 5 EXTENDED COMPONENTS DEFINITION 149 This chapter 5 Extended Components Definition contains the following sections: 5.1 Definition of the family FCS_RNG 5.2 Definition of the Family FMT_LIM 5.3 Definition of the Family FAU_SAS 5.4 Definition of the Family FDP_SDC 5.5 Definition of the Family FIA_API Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 54/105 5.1 Definition of the Family FCS_RNG 150 To define the IT security functional requirements of the TOE an additional family (FCS_RNG) of the Class FCS (cryptographic support) is defined here. This family describes the functional requirements for random number generation used for cryptographic purposes. FCS_RNG Generation of Random Numbers 151 Family behaviour 152 This family defines quality requirements for the generation of random numbers which are intended to be used for cryptographic purposes. 153 Component levelling: FCS_RNG.1 Generation of random numbers requires that random numbers meet a defined quality metric. Management: FCS_RNG.1 There are no management activities foreseen. Audit: FCS_RNG.1 There are no actions defined to be auditable. FCS_RNG.1 Random number generation Hierarchical to: No other components. Dependencies: No dependencies. FCS_RNG.1.1 The TSF shall provide a [selection: physical, non-physical true, deterministic, hybrid] random number generator that implements: [assignment: list of security capabilities]. FCS_RNG.1.2 The TSF shall provide random numbers that meet [assignment: a defined quality metric]. Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 55/105 5.2 Definition of the Family FMT_LIM 154 To define the IT security functional requirements of the TOE an additional family (FMT_LIM) of the Class FMT (Security Management) is defined here. This family describes the functional requirements for the Test Features of the TOE. The new functional requirements were defined in the class FMT because this class addresses the management of functions of the TSF. The examples of the technical mechanism used in the TOE appropriate to address the specific issues of preventing the abuse of functions by limiting the capabilities of the functions and by limiting their availability. 155 The family ―Limited capabilities and availability (FMT_LIM)‖ is specified as follows. FMT_LIM Limited capabilities and availability Family behaviour This family defines requirements that limit the capabilities and availability of functions in a combined manner. Note that FDP_ACF restricts the access to functions whereas the component Limited Capability of this family requires the functions themselves to be designed in a specific manner. Component levelling: FMT_LIM.1 Limited capabilities requires that the TSF is built to provide only the capabilities (perform action, gather information) necessary for its genuine purpose. FMT_LIM.2 Limited availability requires that the TSF restrict the use of functions (refer to Limited capabilities (FMT_LIM.1)). This can be achieved, for instance, by removing or by disabling functions in a specific phase of the TOE’s life-cycle. Management: FMT_LIM.1, FMT_LIM.2 There are no management activities foreseen. Audit: FMT_LIM.1, FMT_LIM.2 There are no actions defined to be auditable. 156 The TOE Functional Requirement ―Limited capabilities (FMT_LIM.1)‖ is specified as follows. FMT_LIM.1 Limited capabilities Hierarchical to: No other components. FMT_LIM.1.1 The TSF shall be designed and implemented in a manner that limits their capabilities so that in conjunction with ―Limited availability (FMT_LIM.2)‖ the Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 56/105 following policy is enforced [assignment: Limited capability and availability policy]. Dependencies: FMT_LIM.2 Limited availability. 157 The TOE Functional Requirement ―Limited availability (FMT_LIM.2)‖ is specified as follows. FMT_LIM.2 Limited availability Hierarchical to: No other components. FMT_LIM.2.1 The TSF shall be designed in a manner that limits their availability so that in conjunction with ―Limited capabilities (FMT_LIM.1)‖ the following policy is enforced [assignment: Limited capability and availability policy]. Dependencies: FMT_LIM.1 Limited capabilities. 158 Application note: The functional requirements FMT_LIM.1 and FMT_LIM.2 assume that there are two types of mechanisms (limited capabilities and limited availability) which together shall provide protection in order to enforce the policy. This also allows that (i) the TSF is provided without restrictions in the product in its user environment but its capabilities are so limited that the policy is enforced or conversely (ii) the TSF is designed with high functionality but is removed or disabled in the product in its user environment. The combination of both requirements shall enforce the policy. Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 57/105 5.3 Definition of the Family FAU_SAS 159 To define the security functional requirements of the TOE an additional family (FAU_SAS) of the Class FAU (Security Audit) is defined here. This family describes the functional requirements for the storage of audit data. It has a more general approach than FAU_GEN, because it does not necessarily require the data to be generated by the TOE itself and because it does not give specific details of the content of the audit records. 160 The family ―Audit data storage (FAU_SAS)‖ is specified as follows. FAU_SAS Audit data storage Family behaviour This family defines functional requirements for the storage of audit data. Component levelling FAU_SAS.1 Requires the TOE to provide the possibility to store audit data. Management: FAU_SAS.1 There are no management activities foreseen. Audit: FAU_SAS.1 There are no actions defined to be auditable. FAU_SAS.1 Audit storage Hierarchical to: No other components. FAU_SAS.1.1 The TSF shall provide [assignment: list of subjects] with the capability to store [assignment: list of audit information] in the [assignment: type of persistent memory]. Dependencies: No dependencies. Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 58/105 5.4 Definition of the Family FDP_SDC 2 To define the security functional requirements of the TOE an additional family (FDP_SDC.1) of the Class FDP (User data protection) is defined here. The family ―Stored data confidentiality (FDP_SDC)‖ is specified as follows. FDP_SDC.1 Stored data confidentiality Family behavior This family provides requirements that address protection of user data confidentiality while these data are stored within memory areas protected by the TSF. The TSF provides access to the data in the memory through the specified interfaces only and prevents compromise of their information bypassing these interfaces. It complements the family ―Stored data integrity (FDP_SDI)‖ which protects the user data from integrity errors while being stored in the memory. Component leveling 3 FDP_SDC.1 Requires the TOE to protect the confidentiality of information of the user data in specified memory areas. Management: FDP_SDC.1. There are no management activities foreseen. Audit: FDP_SDC.1 There are no actions defined to be auditable. FDP_SDC.1 Stored data confidentiality Hierarchical to: No other components. Public S3FT9MH_MV_MG ST Lite_Ver2.0 5 EXTENDED COMPONENTS DEFINITION 59/105 Dependencies: No dependencies. FDP.SDC.1.1 The TSF shall ensure the confidentiality of the information of the user data while it is stored in the [assignment: memory area] 5.5 Definition of the Family FIA_API 4 To describe the IT security functional requirements of the TOE a functional family FIA_API (Authentication Proof of Identity) of the Class FIA (Identification and authentication) is defined here. This family describes the functional requirements for the proof of the claimed identity by the TOE and enables the authentication verification by an external entity. The other families of the class FIA address the verification of the identity of an external entity by the TOE. 5 The other families of the Class FIA describe only the authentication verification of users’ identity performed by the TOE and do not describe the functionality of the user to prove their identity. The following paragraph defines the family FIA_API in the style of the Common Criteria part 2 (cf. [3], chapter ―Extended components definition (APE_ECD)‖) from a TOE point of view. 6 The family ―Authentication Proof of Identity (FIA_API)‖ is specified as follows. FIA_API.1 Authentication Proof of Identity Family behaviour 7 This family defines functions provided by the TOE to prove its identity and to be verified by an external entity in the TOE IT environment. Component levelling FIA_API.1 Authentication Proof of Identity, provides proof of the identity of the TOE, an object or an authorize Management: FIA_API.1 The following actions could be considered for the management functions in FMT: Management of authentication information used to prove the claimed identity. Audit: FIA_API.1 There are no actions defined to be auditable. FIA_API.1 Authentication Proof of Identity Hierarchical to: No other components. Dependencies: No dependencies. FIA_API.1.1 The TSF shall provide a [assignment: authentication mechanism] to prove the identity of the [selection: TOE, [assignment: object, authorized user or role]] to an external entity. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 60/105 6 IT security requirements 161 This chapter 6 IT Security Requirements contains the following sections: 6.1 Security Functional Requirements for the TOE 6.2 Security Assurance Requirements for the TOE 6.3 Security Requirements Rationale Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 61/105 6.1 Security Functional Requirements for the TOE 162 In order to define the Security Functional Requirements the Part 2 of the Common Criteria was used. However, some Security Functional Requirements have been refined. The refinements are described below the associated SFR. The operations completed in the ST are marked in italic font. 6.1.1 Malfunctions 163 The TOE shall meet the requirement ―Limited fault tolerance (FRU_FLT.2)‖ as specified below. FRU_FLT.2 Limited fault tolerance Hierarchical to: FRU_FLT.1 FRU_FLT.2.1 The TSF shall ensure the operation of all the TOE’s capabilities when the following failures occur: exposure to operating conditions which are not detected according to the requirement Failure with preservation of secure state (FPT_FLS.1). Dependencies: FPT_FLS.1 Failure with preservation of secure state Refinement: The term ―failure‖ above means ―circumstances‖. The TOE prevents failures for the ―circumstances‖ defined above. 164 The TOE shall meet the requirement ―Failure with preservation of secure state (FPT_FLS.1)‖ as specified below. FPT_FLS.1 Failure with preservation of secure state Hierarchical to: No other components. FPT_FLS.1.1 The TSF shall preserve a secure state when the following types of failures occur: exposure to operating conditions which may not be tolerated according to the requirement Limited fault tolerance (FRU_FLT.2) and where therefore a malfunction could occur. Dependencies: No dependencies Refinement: The term ―failure‖ above also covers ―circumstances‖. The TOE prevents failures for the ―circumstances‖ defined above. Application note: The secure state is maintained by TOE’s detectors. The TOE’s detectors are monitoring the failure occurs. The failures are abnormal detectors that detect out of the specified range. If the failures are happen, the TOE goes into secure state. This satisfies the FPT_FLS.1 “Failure with preservation of secure state.” 6.1.2 Abuse of Functionality 165 The TOE shall meet the requirement ―Limited capabilities (FMT_LIM.1)‖ as specified below (Common Criteria Part 2 extended). FMT_LIM.1 Limited capabilities Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 62/105 Hierarchical to: No other components. FMT_LIM.1.1 The TSF shall be designed in a manner that limits their capabilities so that in conjunction with ―Limited availability (FMT_LIM.2)‖ the following policy is enforced: Deploying Test Features after TOE Delivery does not allow User Data to be disclosed or manipulated, TSF data to be disclosed or manipulated, software to be reconstructed and no substantial information about construction of TSF to be gathered which may enable other attacks. Dependencies: FMT_LIM.2 Limited availability. 166 The TOE shall meet the requirement ―Limited availability (FMT_LIM.2)‖ as specified below (Common Criteria Part 2 extended). FMT_LIM.2 Limited availability Hierarchical to: No other components. FMT_LIM.2.1 The TSF shall be designed in a manner that limits their availability so that in conjunction with ―Limited capabilities (FMT_LIM.1)‖ the following policy is enforced: Deploying Test Features after TOE Delivery does not allow User Data to be disclosed or manipulated, TSF data to be disclosed or manipulated, software to be reconstructed and no substantial information about construction of TSF to be gathered which may enable other attacks. Dependencies: FMT_LIM.1 Limited capabilities. 167 The TOE shall meet the requirement ―Audit storage (FAU_SAS.1)‖ as specified below (Common Criteria Part 2 extended). FAU_SAS.1 Audit storage Hierarchical to: No other components. FAU_SAS.1.1 The TSF shall provide the test process before TOE Delivery with the capability to store the Initialisation Data and/or Prepersonalisation Data and/or supplements of the Smartcard Embedded Software in a Test ROM area. Dependencies: No dependencies. Application Note: The integrity and uniqueness of the unique identification of the TOE must be supported by the development, production and test environment. 6.1.3 Physical Manipulation and Probing 168 The TOE shall meet the requirement ―Stored data confidentiality (FDP_SDC.1)‖ as specified below. FDP_SDC.1 Stored data confidentiality Hierarchical to: No other components. Dependencies: No dependencies. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 63/105 FDP.SDC.1.1 The TSF shall ensure the confidentiality of the information of the user data while it is stored in the FLASH, RAM or ROM. 169 The TOE shall meet the requirement ―Stored data integrity monitoring and action (FDP_SDI.2)‖ as specified below. FDP_SDI.2 Stored data integrity monitoring and action Hierarchical to: No other components. Dependencies: No dependencies. FDP.SDI.2.1 The TSF shall monitor user data stored in containers controlled by the TSF for error on all objects, based on the following attributes: FLASH, RAM or ROM read operation. FDP.SDI.2.2 Upon detection of a data integrity error, the TSF shall enforce adevice RESET or an interrupt (FIQ). Application Note: This requirement is achieved by security features such internal encryption and scrambling mechanisms. 170 The TOE shall meet the requirement ―Resistance to physical attack (FPT_PHP.3)‖ as specified below. FPT_PHP.3 Resistance to physical attack Hierarchical to: No other components. FPT_PHP.3.1 The TSF shall resist physical manipulation and physical probing to the TSF by responding automatically such that the SFRs are always enforced. Dependencies: No dependencies. Refinement: The TSF will implement appropriate mechanisms to continuously counter physical manipulation and physical probing. Due to the nature of these attacks (especially manipulation) the TSF can by no means detect attacks on all of its elements. Therefore, permanent protection against these attacks is required ensuring that security functional requirements are enforced. Hence, ―automatic response‖ means here (i) assuming that there might be an attack at any time and (ii) countermeasures are provided at any time. Application Note: This requirement is achieved by security feature as the shield must be removed and bypassed in order to perform physical intrusive attacks. The TOE makes appropriate secure reaction to stop operation if a physical manipulation or physical probing attack is detected. And also internal scrambling & encryption for memories and logic area make the reverse-engineering of the TOE layout unpractical. So these functionalities meet the security functional requirement of FPT_PHP.3: Resistance to physical attack Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 64/105 6.1.4 Leakage 171 The TOE shall meet the requirement ―Basic internal transfer protection (FDP_ITT.1)‖ as specified below. FDP_ITT.1 Basic internal transfer protection Hierarchical to: No other components. FDP_ITT.1.1 The TSF shall enforce the Data Processing Policy to prevent the disclosure of user data when it is transmitted between physically-separated parts of the TOE. Dependencies: [FDP_ACC.1 Subset access control, or FDP_IFC.1 Subset information flow control] Refinement: The different memories, the CPU and other functional units of the TOE (e.g. a cryptographic co-processor) are seen as physically-separated parts of the TOE. 172 The TOE shall meet the requirement ―Basic internal TSF data transfer protection (FPT_ITT.1)‖ as specified below. FPT_ITT.1 Basic internal TSF data transfer protection Hierarchical to: No other components. FPT_ITT.1.1 The TSF shall protect TSF data from disclosure when it is transmitted between separate parts of the TOE. Dependencies: No dependencies. Refinement: The different memories, the CPU and other functional units of the TOE (e.g. a cryptographic co-processor) are seen as separated parts of the TOE. This requirement is equivalent to FDP_ITT.1 above but refers to TSF data instead of User Data. Therefore, it should be understood as to refer to the same Data Processing Policy defined under FDP_IFC.1 below. 173 The TOE shall meet the requirement ―Subset information flow control (FDP_IFC.1)‖as specified below: FDP_IFC.1 Subset information flow control Hierarchical to: No other components. FDP_IFC.1.1 The TSF shall enforce the Data Processing Policy on all confidential data when they are processed or transferred by the TOE or by the Security IC Embedded Software. Dependencies: FDP_IFF.1 Simple security attributes 174 The following Security Function Policy (SFP) Data Processing Policy is defined for the requirement ― Subset information flow control (FDP_IFC.1)‖: User Data and TSF data shall not be accessible from the TOE except when the Security IC Embedded Software decides to communicate the User Data via an external interface. The protection shall be applied to confidential data only but without the distinction of attributes controlled by the Security IC Embedded Software. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 65/105 6.1.5 Random Numbers (DTRNG FRO) 175 The TOE shall meet the requirement ―Quality metric for random numbers (FCS_RNG.1)‖ as specified below (Common Criteria Part 2 extended). FCS_RNG.1/PTG.2 Random number generation - PTG.2 Hierarchical to: No other components. FCS_RNG.1.1/PTG.2 The TSF shall provide a physical true random number generator that implements: (PTG.2.1) A total failure test detects a total failure of entropy source immediately when the RNG has started. When a total failure is detected, no random numbers will be output. (PTG.2.2) If a total failure of the entropy source occurs while the RNG is being operated, the RNG prevents the output of any internal random number that depends on some raw random numbers that have been generated after the total failure of the entropy source (PTG.2.3) The online test shall detect non-tolerable statistical defects of the raw random number sequence (i) immediately when the RNG has started, and (ii) while the RNG is being operated. The TSF must not output any random numbers before the power-up online test has finished successfully or when a defect has been detected. (PTG.2.4) The online test procedure shall be effective to detect non-tolerable weaknesses of the random numbers soon. (PTG.2.5) The online test procedure checks the quality of the raw random number sequence. It is triggered at regular intervals or continuously. The online test is suitable for detecting non-tolerable statistical defects of the statistical properties of the raw random numbers within an acceptable period of time FCS_RNG.1.2/PTG.2 The TSF shall provide numbers that meet: (PTG.2.6) Test procedure A does not distinguish the internal random numbers from output sequences of an ideal RNG. (PTG.2.7) The average Shannon entropy per internal random bit exceeds 0.997 Application Note: The DTRNG FRO library comprises some functions that perform statistical tests on the DTRNG FRO output. If either test fails, the function returns an error value and the DTRNG FRO is shut down. Those functions are described in DTRNG FRO Application note in detail and are available to embedded software. FCS_RNG.1/RGS_B1 Random number generation – RGS_B1 Hierarchical to: No other components. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 66/105 FCS_RNG.1.1/RGS_B1 The TSF shall provide a physical random number generator that implements - the rules RègleArchiGVA-1 and the recommendation RecomArchiGVA-1 of [21] ; - total failure tests and online tests. FCS_RNG.1.2/RGS_B1 The TSF shall provide random numbers that meet the rule RègleArchiGVA-2 of [21]. Dependencies: No dependencies. Warning: The TSF fulfils some but not all the necessary rules to comply with [21] regarding random numbers generators (RNG). The composite product's RNG will comply with [21] only when all the rules of §2.4 "Génération d'aléa cryptographique" of [21] are addressed. In particular, a cryptographic post-processing must be implemented by the composite developer. 6.1.6 Alternative Random Numbers (EHP DTRNG FRO) 176 The TOE shall meet the requirement ―Quality metric for random numbers (FCS_RNG.1)‖ as specified below (Common Criteria Part 2 extended). FCS_RNG.1/EHP Random number generation (alternative) Hierarchical to: No other components. FCS_RNG.1.1/EHP The TSF shall provide a physical true random number generator that implements: (RNG.2.1) A health test that detects severe degradation of entropy source. When the health test fails, RNG must not be used. (RNG.2.2) A test that detects malfunction in RNG system including post-processing mechanism, control logic, etc. If problem is detected, no random number is generated. FCS_RNG.1.2/EHP The TSF shall provide random numbers that meet: (RNG.2.3) Generated random numbers shall pass AIS31 statistical tests (Test Procedure A). Application Note: The EHP DTRNG FRO library comprises some functions that perform statistical tests on the DTRNG FRO output in order to execute so-called health test. If health test fails, the function returns an error value and the DTRNG FRO is shut down. The library also provides a function to generate random numbers for user applications. This function also checks if there is any malfunction in the post- processing mechanism or potential fault attacks. If that is the case, DTRNG FRO is turned off and no random numbers will be returned. Those functions are described in EHP DTRNG FRO Application note in detail and are available to embedded software. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 67/105 Dependencies: No dependencies 6.1.7 Memory Access Control 177 Usage of multiple applications in one Smartcard often requires separating code and data in order to prevent that one application can access code and/or data of another application. To support the TOE provides Area based Memory Access Control. 178 The security service being provided is described in the Security Function Policy (SFP) Memory Access Control Policy. The security functional requirement ―Subset access control (FDP_ACC.1)‖ requires that this policy is in place and defines the scope were it applies. The security functional requirement ―Security attribute based access control (FDP_ACF.1)‖ defines addresses security attribute usage and characteristics of policies. It describes the rules for the function that implements the Security Function Policy (SFP) as identified in FDP_ACC.1. The decision whether an access is permitted or not is taken based upon attributes allocated to the software. The user software defines the attributes and memory areas. The corresponding permission control information is evaluated ―on-the-fly‖ by the hardware so that access is granted/effective or denied/inoperable. 179 The security functional requirement ―Static attribute initialization (FMT_MSA.3)‖ ensures that the default values of security attributes are appropriately either permissive or restrictive in nature. Alternative values can be specified by any subject provided that the Memory Access Control Policy allows that. This is described by the security functional requirement ―Management of security attributes (FMT_MSA.1)‖. The attributes are determined during TOE manufacturing (FMT_MSA.3) or set at run-time (FMT_MSA.1). 180 From TOE´s point of view the different roles in the user software can be distinguished according to the memory based access control. However the definition of the roles belongs to the user software. 181 The following Security Function Policy (SFP) Memory Access Control Policy is defined for the requirement ―Security attribute based access control (FDP_ACF.1)‖: Memory Access Control Policy The TOE shall control read, write, delete, and execute accesses of software running at between two different modes (privilege and user mode) on data including code stored in memory areas. The TOE shall restrict the ability to define, to change or at least to finally accept the applied rules (as mentioned in FDP_ACF.1) to software with privilege mode). 182 The TOE shall meet the requirement ―Subset access control (FDP_ACC.1)‖ as specified below. FDP_ACC.1 Subset access control Hierarchical to: No other components. FDP_ACC.1.1 The TSF shall enforce the Memory Access Control Policy on all subjects (software with privilege mode and user mode), all objects (data including code stored in memories) and all the operations defined in the Memory Access Control Policy. Subjects are software codes in Privilege and User mode. Objects are data stored in ROM, RAM and FLASH memories. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 68/105 Dependencies: FDP_ACF.1 Security attribute based access control The TOE shall meet the requirement ―Security attribute based access control (FDP_ACF.1)‖ as specified below. FDP_ACF.1 Security attribute based access control The attributes are all the operations related to the data stored in memories, which are the read, write and execute operations. Hierarchical to: No other components. FDP_ACF.1.1 The TSF shall enforce the Memory Access Control Policy to objects based on the memory area where the software is executed from and/or the memory area where the access is performed to and/or the operation to be performed. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 69/105 FDP_ACF.1.2 The TSF shall enforce the following rules to determine if an operation among controlled subjects and controlled objects is allowed: evaluate the corresponding permission control information before the access so that accesses to be denied cannot be utilised by the subject attempting to perform the operation. FDP_ACF.1.3 The TSF shall explicitly authorise access of subjects to objects based on the following additional rules: none. FDP_ACF.1.4 The TSF shall explicitly deny access of subjects to objects based on the following additional rules: none. Dependencies: FDP_ACC.1 Subset access control FMT_MSA.3 Static attribute initialisation The TOE shall meet the requirement ―Static attribute initialisation (FMT_MSA.3)‖ as specified below. FMT_MSA.3 Static attribute initialisation Hierarchical to: No other components. FMT_MSA.3.1 The TSF shall enforce the Memory Access Control Policy to provide well defined default values for security attributes that are used to enforce the SFP. FMT_MSA.3.2 The TSF shall allow any subject (provided that the Memory Access Control Policy is enforced and the necessary access is therefore allowed) to specify alternative initial values to override the default values when an object or information is created. Dependencies: FMT_MSA.1 Management of security attributes FMT_SMR.1 Security roles 183 The TOE shall meet the requirement ―Management of security attributes (FMT_MSA.1)‖ as specified below: FMT_MSA.1 Management of security attributes Hierarchical to: No other components. FMT_MSA.1.1 The TSF shall enforce the Memory Access Control Policy to restrict the ability to change default, modify or delete the security attributes permission control infor- mation to running at privilege mode. Dependencies: [FDP_ACC.1 Subset access control or FDP_IFC.1 Subset information flow control] FMT_SMF.1 Specification of management functions FMT_SMR.1 Security roles 184 The TOE shall meet the requirement ―Specification of management functions (FMT_SMF.1)‖ as specified below: FMT_SMF.1 Specification of management functions Hierarchical to: No other components Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 70/105 FMT_SMF.1.1 The TSF shall be capable of performing the following security management functions: access the control registers of the MPU. Dependencies: No dependencies 6.1.8 Cryptographic Support 185 FCS_COP.1 Cryptographic operation requires, a cryptographic operation to be performed in accordance with a specified algorithm and with a cryptographic key of specified sizes. The specified algorithm and cryptographic key sizes can be based on an assigned standard. 186 The following additional specific security functionality is implemented in the TOE:  Triple Data Encryption Standard (TDES) with 112bit or 168bit key size  Advanced Encryption Standard (AES) with 128 bit, 192bit and 256bit key size  Rivest-Shamir-Adleman (RSA) public key asymmetric cryptography, with key size 1280-bit up to 4096-bit with a granularity of 2 bits (optional)  Elliptic Curve Cryptography (ECC) (optional)  Secure Hash Algorithm (SHA) (optional) 6.1.9 Triple-DES Operation 187 The Triple DES (TDES) operation of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. FCS_COP.1/TDES Cryptographic operation – TDES Hierarchical to: No other components. FCS_COP.1.1/TDES The TSF shall perform encryption and decryption in accordance with a specified cryptographic algorithm Triple Data Encryption Standard (TDES) - ECB mode and cryptographic key sizes 112 bit or 168 bit key size that meet the following standards: [FIPS SP800-67], chapter 2 and 3. TOE implements TDES with key option 1 and 2 with ECB mode. Dependencies: [FDP_ITC.1 Import of user data without security attributes or FDP_ITC.2 Import of user data with security attributes, or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction 6.1.10 AES Operation 188 The AES operation of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 71/105 FCS_COP.1/AES Cryptographic operation – AES Hierarchical to: No other components. FCS_COP.1.1/AES The TSF shall perform encryption and decryption in accordance with a specified cryptographic algorithm Advanced Encryption Standard (AES) - ECB mode and cryptographic key sizes 128bit, 192bit or 256bit key size that meet the following standard: [FIPS197], chapter 5. Dependencies: [FDP_ITC.1 Import of user data without security attributes or FDP_ITC.2 Import of user data with security attributes or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction 6.1.11 Rivest-Shamir-Adleman (RSA) Operation (optional) The RSA/ECC cryptographic library of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. FCS_COP.1/RSA Cryptographic operation Hierarchical to: No other components FCS_COP.1.1/RSA The TSF shall perform the modular exponentiation part of RSA signature generation and verification in accordance with a specified cryptographic algorithm Rivest-Shamir-Adleman (RSA:standard RSA and RSA-CRT) and cryptographic key sizes from 1280-bit up to 4096-bit with 2-bit granularity that meet the following standard: [ISO/IEC14888-2:2008]] section 6.2 and 6.3. Dependencies: [FDP_ITC.1 Import of user data without security attributes or FDP_ITC.2 Import of user data with security attributes, or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction 6.1.12 Rivest-Shamir-Adleman (RSA) Key Generation (optional) The RSA key generation for the RSA/ECC library shall meet the requirement ―Cryptographic key generation (FCS_CKM.1)‖ as specified below. FCS_CKM.1/RSA Cryptographic key generation Hierarchical to: No other components FCS_CKM.1.1/RSA The TSF shall generate the RSA public/private key pair in accordance with the specified cryptographic key generation algorithm and with the specified cryptographic key size from 1280-bit up to 4096-bit with 2-bit granularity that meet the following standards: [ETSI TS 102 176-1], section 6.2.2.1 Key and parameter generation algorithm rsagen1. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 72/105 Dependencies: [FCS_CKM.2 Cryptographic key distribution or FCS_COP.1 Cryptographic operation] FCS_CKM.4 Cryptographic key destruction 6.1.13 Elliptic Curve DSA Operation (optional) The ECC library of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. FCS_COP.1/ECDSA Cryptographic operation Hierarchical to: No other components FCS_COP.1.1/ECDSA The TSF shall perform the signature generation/verification in accordance with the specified cryptographic algorithm ECDSA and cryptographic key sizes from 192-bit up to 512-bit that meet the following standard: [ANS X9.62] , section 7.3 Signing Process and section 7.4 Verifying Process. Dependencies: [FDP_ITC.1 Import of user data without security attributes or FDP_ITC.2 Import of user data with security attributes, or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction Note1) The RSA/ECC library supports any valid curves over prime fields of size from 192-bit to 512-bit. However standard curves listed below whose security has been proven are in the scope of this evaluation. 1) [NIST curves]: Curves P-192, P-224, P-256, P-384 2) [Brainpool curves]: brainpoolP192r1, brainpoolP192t1, brainpoolP224r1, brainpoolP224t1, brainpoolP256r1, brainpoolP256t1, brainpoolP320r1, brainpoolP320t1, brainpoolP384r1, brainpoolP384t1, brainpoolP512r1, brainpoolP512t1, 3) [SEC-recommended curves]: secp192k1, secp192r1, secp224k1, secp224r1, secp256k1, secp256r1, secp384r1 Note2) The TOE offers the functionality of hash value computation using SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512. However, only the functions related to SHA-224, SHA-256, SHA-384 and SHA-512 is in the scope of this evaluation and is intended to be used for signature generation and verification. Note that neither of the functions must be used to hash secret values. In addition, the user is responsible for the truncation or padding of the hash value as required by step e), section 7.3 and step c), section 7.4.1 of the standard cited above. 6.1.14 Elliptic Curve DSA Key Generation (optional) The key generation for the ECC library shall meet the requirement ―Cryptographic key generation (FCS_CKM.1)‖ as specified below. FCS_CKM.1/ECDSA Cryptographic key generation Hierarchical to: No other components Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 73/105 FCS_CKM.1.1/ECDSA The TSF shall generate ECC cryptographic keys in accordance with the cryptographic key generation algorithm specified in [ANS X9.62] and with the cryptographic key sizes from 192-bit up to 512-bit that meet the following standard: [ANS X9.62] , section A.4.3 Elliptic Curve Key Generation. Dependencies: [FCS_CKM.2 Cryptographic key distribution or FCS_COP.1 Cryptographic operation] FCS_CKM.4 Cryptographic key destruction Note1) The RSA/ECC library supports any valid curves over prime fields of size from 192-bit to 512-bit. However standard curves listed below whose security has been proven are in the scope of this evaluation. 1) [NIST curves]: Curves P-192, P-224, P-256, P-384 2) [Brainpool curves]: brainpoolP192r1, brainpoolP192t1, brainpoolP224r1, brainpoolP224t1, brainpoolP256r1, brainpoolP256t1, brainpoolP320r1, brainpoolP320t1, brainpoolP384r1, brainpoolP384t1, brainpoolP512r1, brainpoolP512t1, 3) [SEC-recommended curves]: secp192k1, secp192r1, secp224k1, secp224r1, secp256k1, secp256r1, secp384r1 6.1.15 Elliptic Curve Diffie-Hellman (ECDH) Key Agreement (optional) The ECC library of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. FCS_COP.1/ECDH Cryptographic operation Hierarchical to: No other components FCS_COP.1.1/ECDH The TSF shall perform the key exchange in accordance with the specified cryptographic algorithm ECDH and cryptographic key sizes from 192-bit up to 512-bit that meet the following standard: [ANS X9.63], section 5.4.1 Standard Diffie-Hellman primitive. Dependencies: [FDP_ITC.1 Import of user data without security attributes or FDP_ITC.2 Import of user data with security attributes, or FCS_CKM.1 Cryptographic key generation] FCS_CKM.4 Cryptographic key destruction Note1) The RSA/ECC library supports any valid curves over prime fields of size from 192-bit to 512-bit. However standard curves listed below whose security has been proven are in the scope of this evaluation. 1) [NIST curves]: Curves P-192, P-224, P-256, P-384 2) [Brainpool curves]: brainpoolP192r1, brainpoolP192t1, brainpoolP224r1, brainpoolP224t1, brainpoolP256r1, brainpoolP256t1, brainpoolP320r1, brainpoolP320t1, brainpoolP384r1, brainpoolP384t1, brainpoolP512r1, brainpoolP512t1, 3)[SEC-recommended curves]: secp192k1, secp192r1, secp224k1, secp224r1, secp256k1, secp256r1, secp384r1 Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 74/105 Note2) The implemented routines can be used with ephemeral or static private keys. The base point is assumed to be public. Note3) For full compatibility, the user is responsible to perform step 2 of [ANS X9.63], section 5.2.2.1, prior to using the ECDH_generate function. 6.1.16 Secure Hash Algorithm (SHA) (optional) The Secure Hash Algorithm (SHA) of the TOE shall meet the requirement ―Cryptographic operation (FCS_COP.1)‖ as specified below. FCS_COP.1/SHA Cryptographic operation Hierarchical to: No other components FCS_COP.1.1/SHA The TSF shall perform secure hash computation in accordance with a specified cryptographic algorithm SHA1, SHA224, SHA256, SHA384 and SHA512 and cryptographic key sizes none that meet the following standard: [FIPS PUB 180-3]. Note1) The TORNADO-E RSA/ECC library provides the functionalities for computation of hash values. The use of these functionalities for keyed hash operations like HMAC or similar, is not subject of this TOE and requires specific security improvements and DPA analysis by the operating system which is not part of the TOE. The SHA224, SHA256, SHA384 and SHA512 functionalities are intended to be used for ECDSA signature generation and verification. Dependencies: No dependencies 6.1.17 Bootloader The TOE Functional Requirement “Limited capabilities – Loader(FMT_LIM.1/Loader)” is specified as follows. FMT_LIM.1/Loader Limited capabilities Hierarchical to: No other components. FMT_LIM.1.1/Loader The TSF shall be designed and implemented in a manner that limits its capabilities so that in conjunction with “Limited availability (FMT_LIM.2)” the following policy is enforced: Deploying Loader functionality after locking to Flash Reset does not allow stored user data to be disclosed or manipulated by unauthorized user. Dependencies: FMT_LIM.2 Limited availability. The TOE Functional Requirement “Limited availability – Loader (FMT_LIM.2/Loader)” is specified as follows. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 75/105 FMT_LIM.2/Loader Limited availability - Loader Hierarchical to: No other components. FMT_LIM.2.1/Loader The TSF shall be designed in a manner that limits its availability so that in conjunction with “Limited capabilities (FMT_LIM.1)” the following policy is enforced: The TSF prevents deploying the Loader functionality after locking to Flash Reset. Dependencies: FMT_LIM.1 Limited capabilities. The TOE Functional Requirement “Inter-TSF trusted channel (FTP_ITC.1)” is specified as follows. FTP_ITC.1 Inter-TSF trusted channel Hierarchical to: No other components. FTP_ITC.1.1 The TSF shall provide a communication channel between itself and the authorized user that is logically distinct from other communication channels and provides assured identification of its end points and protection of the channel data from modification or disclosure. FTP_ITC.1.2 The TSF shall permit another trusted IT product to initiate communication via the trusted channel. FTP_ITC.1.3 The TSF shall initiate communication via the trusted channel for deploying Loader mutual Authentication and establishment of session keys. Dependencies: No dependencies. The TOE Functional Requirement “Basic data exchange confidentiality (FDP_UCT.1)” is specified as follows. FDP_UCT.1 Basic data exchange confidentiality Hierarchical to: No other components. FDP_UCT.1.1 The TSF shall enforce the Loader SFP to receive user data in a manner protected from unauthorised disclosure. Dependencies: [FTP_ITC.1 Inter-TSF trusted channel, or FTP_TRP.1 Trusted path] [FDP_ACC.1 Subset access control, or FDP_IFC.1 Subset information flow control] The TOE Functional Requirement “Data exchange integrity (FDP_UIT.1)” is specified as follows. FDP_UIT.1 Data exchange integrity Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 76/105 Hierarchical to: No other components. FDP_UIT.1.1 The TSF shall enforce the Loader SFP to receive user data in a manner protected from modification, deletion, insertion errors. FDP_UIT.1.2 The TSF shall be able to determine on receipt of user data, whether modification, deletion, insertion has occurred. Dependencies: [FTP_ITC.1 Inter-TSF trusted channel, or FTP_TRP.1 Trusted path] [FDP_ACC.1 Subset access control, or FDP_IFC.1 Subset information flow control] The TOE Functional Requirement “Subset access control - Loader (FDP_ACC.1/Loader)” is specified as follows. FDP_ACC.1/ Loader Subset access control - Loader Hierarchical to: No other components. Dependencies: FDP_ACC.1.1/ Loader The TSF shall enforce the Loader SFP on (1) the subjects Authentication Sequence and Flash Attribute control APDU command, (2) the objects user data in FLASH or ROM (3) the operation deployment of Loader Dependencies: FDP_ACF.1 Security attribute based access control. Application Note 38: The TOE enforces the Loader SFP by FTP_ITC.1, FDP_UCT.1 and FDP_UIT.1 and FDP_ACF.1 to describe additional access control rules. The TOE Functional Requirement “Security attribute based access control - Loader (FDP_ACF.1/Loader)” is specified as follows. FDP_ACF.1/ Loader Security attribute based access control - Loader Hierarchical to: No other components. FDP_ACF.1.1/ FDP_ACF.1.1 The TSF shall enforce the Loader SFP to objects based on the following: Loader (1) the subjects Bootloader with security attributes FLASH write. (2) the objects user data in FLASH with security attributes FLASH write. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 77/105 FDP_ACF.1.2/ Loader FDP_ACF.1.2 The TSF shall enforce the following rules to determine if an operation among controlled subjects and controlled objects is allowed: Bootloader can do write operation in FLASH after succession of Authentication.. FDP_ACF.1.3/ Loader FDP_ACF.1.3 The TSF shall explicitly authorize access of subjects to objects based on the following additional rules: FLASH can be controlled based on security attributes ,which can be limited by Bootlaoder APDU command. FDP_ACF.1.4/ Loader The TSF shall explicitly deny access of subjects to objects based on the following additional rules: Bootloader can’t access the FLASH wihout succession of Authentication.. Dependencies: FMT_MSA.3 Static attribute initialization. . 6.1.18 Authentication Proof of Identity The TOE shall meet the requirement ―Authentication Proof of Identity (FIA_API.1)‖ as specified below. FIA_API.1 Authentication Proof of Identity Hierarchical to: No other components Dependencies: No dependencies. FIA_API.1.1 The TSF must provide a mutual authentication of Bootloader to prove the identity of the TOE to an external entity 6.1.19 Summary of Security Functional Requirements Security Functional Requirements Limited fault tolerance (FRU_FLT.2) Failure with preservation of secure state (FPT_FLS.1) Audit storage (FAU_SAS.1) Stored data confidentiality (FDP_SDC.1) Stored data integrity monitoring and action (FDP_SDI.2) Limited capabilities(FMT_LIM.1) Limited availability (FMT_LIM.2) Resistance to physical attack (FPT_PHP.3) Basic internal transfer protection (FDP_ITT.1) Basic internal TSF data transfer protection (FPT_ITT.1) Subset information flow control (FDP_IFC.1) Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 78/105 Authentication Proof of Identity (FIA_API.1) Limited capabilities(FMT_LIM.1/Loader) Limited availability - Loader(FMT_LIM.2/Loader) Inter-TSF trusted channel (FTP_ITC.1) Basic data exchange confidentiality (FDP_UCT.1) Data exchange integrity (FDP_UIT.1) Subset access control - Loader (FDP_ACC.1/ Loader) Security attribute based access control - Loader (FDP_ACF.1/Loader) Quality metric for random numbers (FCS_RNG.1/ PTG.2) Quality metric for random numbers (FCS_RNG.1/RGS_B1) Alternative quality metric for random numbers (FCS_RNG.1/EHP) Table 5 Security Functional Requirements defined in Smart Card IC Protection Profile Security Functional Requirements Subset access control (FDP_ACC.1) Security attribute based access control (FDP_ACF.1) Static attribute initialization (FMT_MSA.3 ) Management of security attributes (FMT_MSA.1) Specification of management functions (FMT_SMF.1) Cryptographic operation (FCS_COP.1/TDES) Cryptographic operation (FCS_COP.1/AES) Cryptographic operation (FCS_COP.1/RSA) (optional) Cryptographic key generation (FCS_CKM.1/ RSA) (optional) Cryptographic operation (FCS_COP.1/ECDSA) (optional) Cryptographic operation (FCS_COP.1/ECDH) (optional) Cryptographic key generation (FCS_CKM.1/ ECDSA) (optional) Cryptographic key generation (FCS_COP.1/SHA) (optional) Random number generation – PTG.2(FCS_RNG.1/PTG.2) Random number generation – RGS B1 (FCS_RNG.1/RGS_B1) Random number generation – EHP(FCS_RNG.1/EHP) Table 6 Augmented Security Functional Requirements Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 79/105 6.2 TOE Assurance Requirements 189 The Security Target will be evaluated according to Security Target evaluation (Class ASE) 190 The TOE Assurance Requirements for the evaluation of the TOE and its development and operating environment are those taken from the Evaluation Assurance Level 6 (EAL6) 191 and augmented by the following component ASE_TSS.2 192 corresponding to level ―EAL6+‖. 193 All refinements from Protection Profile BSI-PP-0084 version 1.0 for the assurance requirements (ALC_DEL, ALC_DVS, ALC_CMS, ALC_CMC, ADV_ARC, ADV_FSP, ADV_IMP, ATE_COV, AGD_OPE, AGD_PRE and AVA_VAN) have to be taken into consideration. In particular the document [12] is used in the context of vulnerability analysis. Class ADV: Development Architectural design (ADV_ARC.1) Security Policy Model (ADV_SPM.1) Functional Specification (ADV_FSP.5) Implementation Representation (ADV_IMP.2) TSF Internals (ADV_INT.3) TOE Design (ADV_TDS.5) Class AGD: Guidance documents activities Operational User Guidance (AGD_OPE.1) Preparative procedures (AGD_PRE.1) Class ALC: Life-cycle support CM Capabilities (ALC_CMC.5) CM Scope (ALC_CMS.5) Delivery (ALC_DEL.1) Development Security (AULCU_DVS.2) Life Cycle Definition (ALC_LCD.1) Tools and Techniques (ALC_TAT.3) Class ASE: Security Target evaluation Conformance claims (ASE_CCL.1) Extended components definition (ASE_ECD.1) ST introduction (ASE_INT.1) Security objectives (ASE_OBJ.2) Derived security requirements (ASE_REQ.2) Security problem definition (ASE_SPD.1) TOE summary specification (ASE_TSS.2) Class ATE: Tests Coverage (ATE_COV.3) Depth (ATE_DPT.3) Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 80/105 Functional Tests (ATE_FUN.2) Independent Testing (ATE_IND.2) Class AVA: Vulnerability assessment Vulnerability Analysis (AVA_VAN.5) Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 81/105 6.3 Security Requirements Rationale 6.3.1 Rationale for the Security Functional Requirements 194 Table 7 below gives an overview, how the security functional requirements are combined to meet the security objectives. The detailed justification follows after the table. Objective TOE Security Functional and Assurance Requirements O.Leak-Inherent - FDP_ITT.1 ―Basic internal transfer protection‖ - FPT_ITT.1 ―Basic internal TSF data transfer protection‖ - FDP_IFC.1 ―Subset information flow control‖ - AVA_VAN.5 ―Advanced methodical vulnerability analysis‖ O.Phys-Probing - FDP_SDC.1 ―Stored data confidentiality‖ - FPT_PHP.3 ―Resistance to physical attack‖ O.Malfunction - FRU_FLT.2 ―Limited fault tolerance - FPT_FLS.1 ―Failure with preservation of secure state‖ - ADV_ARC.1 ―Architectural Design with domain separation and non-bypassability‖ O.Phys-Manipulation - FDP_SDI.2 ―Stored data integrity monitoring and action‖ - FPT_PHP.3 ―Resistance to physical attack‖ O.Leak-Forced All requirements listed for O.Leak-Inherent - FDP_ITT.1, FPT_ITT.1, FDP_IFC.1, AVA_VAN.5 plus those listed for O.Malfunction and O.Phys-Manipulation - FRU_FLT.2, FPT_FLS.1, FPT_PHP.3, ADV_ARC.1 O.Abuse-Func - FMT_LIM.1 ―Limited capabilities‖ - FMT_LIM.2 ―Limited availability‖ plus those for O.Leak-Inherent, O.Phys-Probing, O.Malfunction, O.Phys-Manipulation, O.Leak-Forced - FDP_ITT.1, FPT_ITT.1, FDP_IFC.1, FPT_PHP.3, FRU_FLT.2, FPT_FLS.1, ADV_ARC.1 O.Identification - FAU_SAS.1 ―Audit storage‖ O.RND - FCS_RNG.1/ PTG.2 ―Quality metric for random numbers‖ and FCS_RNG.1/RGS_B1 ―Quality metric for random numbers‖ or FCS_RNG.1/EHP ―Alternative Quality metric for random numbers‖ plus those for O.Leak-Inherent, O.Phys-Probing, O.Malfunction, O.Phys-Manipulation, O.Leak-Forced - FDP_ITT.1, FPT_ITT.1, FDP_IFC.1, FPT_PHP.3, FRU_FLT.2, FPT_FLS.1, AVA_VAN.5, ADV_ARC.1 OE.Resp-Appl not applicable Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 82/105 Objective TOE Security Functional and Assurance Requirements OE.Process-Sec-IC not applicable O.Mem-Access - FDP_ACC.1 ―Subset access control‖ - FDP_ACF.1 ―Security attribute based access control‖ - FMT_MSA.3 ―Static attribute initialisation‖ - FMT_MSA.1 ―Management of security attributes‖ - FMT_SMF.1 ―Specification of Management Functions‖ O.TDES - FCS_COP.1/TDES - FCS_CKM.1/TDES O.AES - FCS_COP.1/ AES - FCS_CKM.1/AES O.RSA - FCS_COP.1/RSA - FCS_CKM.1/RSA O.ECC - FCS_COP.1/ ECDSA ,ECDH - FCS_CKM.1/ ECDSA O.SHA - FCS_COP.1/SHA - FCS_CKM.1/SHA O.Authentication - FIA_API.1 ‖ Authentication Proof of Identity‖ OE.TOE_Auth not applicable O.Cap_Avail_Loader - FMT_LIM.1/Loader ―Limited capabilities‖ - FMT_LIM.2/Loader ―Limited availability – Loader‖ OE.Lim_Block_Loader not applicable O.Ctrl_Auth_Loader - FTP_ITC.1 "Inter-TSF trusted channel" - FDP_UCT.1 "Basic data exchange confidentiality" - FDP_UIT.1 "Data exchange integrity" - FDP_ACC.1/Loader "Subset access control - Loader" - FDP_ACF.1/Loader "Security attribute based access control - Loader" OE.Loader_Usage not applicable Table 7: Security Requirements versus Security Objectives 195 The justification related to the security objective ―Protection against Inherent Information Leakage (O.Leak-Inherent)‖ is as follows: 196 The refinements of the security functional requirements FPT_ITT.1 and FDP_ITT.1 together with the policy statement in FDP_IFC.1 explicitly require the prevention of disclosure of secret data (TSF data as well as User Data) when transmitted between separate parts of the TOE or while being processed. This includes that attackers cannot reveal such data by measurements of emanations, power consumption or other behavior of the TOE while data are transmitted between or processed by TOE parts. 197 It is possible that the TOE needs additional support by the Security IC Embedded Software (e.g. timing Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 83/105 attacks are possible if the processing time of algorithms implemented in the software depends on the content of secret). This support must be addressed in the Guidance Documentation. Together with this FPT_ITT.1, FDP_ITT.1 and FDP_IFC.1 are suitable to meet the objective. 198 The justification related to the security objective ―Protection against Physical Probing (O.Phys-Probing)‖ is as follows: 199 The SFR FDP_SDC.1 requires the TSF to protect the confidentiality of the information of the user data stored in specified memory areas and prevent its compromise by physical attacks bypassing the specified interfaces for memory access. The scenario of physical probing as described for this objective is explicitly included in the assignment chosen for the physical tampering scenarios in FPT_PHP.3. Therefore, it is clear that this security functional requirement supports the objective. 200 It is possible that the TOE needs additional support by the Security IC Embedded Software (e. g. to send data over certain buses only with appropriate precautions). In this case the combination of the Security IC Embedded Software together with FPT_PHP.3 is suitable to meet the objective. 201 The justification related to the security objective ―Protection against Malfunctions (O.Malfunction)‖ is as follows: 202 The definition of this objective shows that it covers a situation, where malfunction of the TOE might be caused by the operating conditions of the TOE (while direct manipulation of the TOE is covered O.Phys- Manipulation). There are two possibilities in this situation: Either the operating conditions are inside the tolerated range or at least one of them is outside of this range. The second case is covered by FPT_FLS.1, because it states that a secure state is preserved in this case. The first case is covered by FRU_FLT.2 because it states that the TOE operates correctly under normal (tolerated) conditions. The functions implementing FRU_FLT.2 and FPT_FLS.1 must work independently so that their operation cannot affected by the Security IC Embedded Software (refer to the refinement). Therefore, there is no possible instance of conditions under O.Malfunction, which is not covered. 203 The justification related to the security objective ―Protection against Physical Manipulation (O.Phys-Manipulation)‖ is as follows: 204 The SFR FDP_SDI.2 requires the TSF to detect the integrity errors of the stored user data and react in case of detected errors. The scenario of physical manipulation as described for this objective is explicitly included in the assignment chosen for the physical tampering scenarios in FPT_PHP.3. Therefore, it is clear that this security functional requirement supports the objective. 205 It is possible that the TOE needs additional support by the Embedded Software (for instance by implementing FDP_SDI.1 to check data integrity with the help of appropriate checksums, refer to Section 6.1). This support must be addressed in the Guidance Documentation. Together with this FPT_PHP.3 is suitable to meet the objective. 206 The justification related to the security objective ―Protection against Forced Information Leakage (O.Leak-Forced)― is as follows: 207 This objective is directed against attacks, where an attacker wants to force an information leakage, which would not occur under normal conditions. In order to achieve this the attacker has to combine a first attack step, which modifies the behaviour of the TOE (either by exposing it to extreme operating conditions or by directly manipulating it) with a second attack step measuring and analysing some output produced by the TOE. The first step is prevented by the same measures which support O.Malfunction and O.Phys-Manipulation, respectively. The requirements covering O.Leak-Inherent also support O.Leak-Forced because they prevent the attacker from being successful if he tries the second step directly. 208 The justification related to the security objective ―Protection against Abuse of Functionality (O.Abuse-Func)‖ Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 84/105 is as follows: 209 This objective states that abuse of functions (especially provided by the IC Dedicated Test Software, for instance in order to read secret data) must not be possible in Phase 7 of the life-cycle. There are two possibilities to achieve this: (i) They cannot be used by an attacker (i. e. its availability is limited) or (ii) using them would not be of relevant use for an attacker (i. e. its capabilities are limited) since the functions are designed in a specific way. The first possibility is specified by FMT_LIM.2 and the second one by FMT_LIM.1. Since these requirements are combined to support the policy, which is suitable to fulfil O.Abuse-Func, both security functional requirements together are suitable to meet the objective. 210 Other security functional requirements which prevent attackers from circumventing the functions implementing these two security functional requirements (for instance by manipulating the hardware) also support the objective. The relevant objectives are also listed in Table 7. 211 It was chosen to define FMT_LIM.1 and FMT_LIM.2 explicitly (not using Part 2 of the Common Criteria) for the following reason: Though taking components from the Common Criteria catalogue makes it easier to recognise functions, any selection from Part 2 of the Common Criteria would have made it harder for the reader to understand the special situation meant here. As a consequence, the statement of explicit security functional requirements was chosen to provide more clarity. 212 The justification related to the security objective ―TOE Identification (O.Identification)― is as follows: 213 Obviously the operations for FAU_SAS.1 are chosen in a way that they require the TOE to provide the functionality needed for O.Identification. The Initialisation Data (or parts of them) are used for TOE identification. The technical capability of the TOE to store Initialisation Data and/or Pre-personalisation Data is provided according to FAU_SAS.1. 214 It was chosen to define FAU_SAS.1 explicitly (not using a given security functional requirement from Part 2 of the Common Criteria) for the following reason: The security functional requirement FAU_GEN.1 in Part 2 of the CC requires the TOE to generate the audit data and gives details on the content of the audit records (for instance data and time). The possibility to use the functions in order to store security relevant data which are generated outside of the TOE, is not covered by the family FAU_GEN or by other families in Part 2. Moreover, the TOE cannot add time information to the records, because it has no real time clock. Therefore, the new family FAU_SAS was defined for this situation. 215 The objective must be supported by organisational and other measures, which the TOE Manufacturer has to implement. These measures are a subset of those measures, which are examined during the evaluation of the assurance requirements of the classes AGD and ALC. 216 The justification related to the security objective ―Random Numbers (O.RND)‖ is as follows: 217 Other security functional requirements, which prevent physical manipulation and malfunction of the TOE (see the corresponding objectives listed in the table), support this objective because they prevent attackers from manipulating or otherwise affecting the random number generator. 218 Random numbers are often used by the Security IC Embedded Software to generate cryptographic keys for internal use. Therefore, the TOE must prevent the unauthorised disclosure of random numbers. Other security functional requirements which prevent inherent leakage attacks, probing and forced leakage attacks ensure the confidentiality of the random numbers provided by the TOE. 219 Depending on the functionality of specific TOEs the Security IC Embedded Software will have to support the objective by providing runtime-tests of the random number generator. Together, these requirements allow the TOE to provide cryptographically good random numbers and to ensure that no information about the produced random numbers is available to an attacker. Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 85/105 220 It was chosen to define FCS_RNG.1 explicitly, because Part 2 of the Common Criteria does not contain generic security functional requirements for Random Number generation. (Note, that there are security functional requirements in Part 2 of the Common Criteria, which refer to random numbers. However, they define requirements only for the authentication context, which is only one of the possible applications of random numbers.) 221 The security objective ―Capability and availability of the Loader (O.Cap_Avail_Loader) is directly covered by the SFR FMT_LIM.1/Loader and FMT_LIM.2/Loader. 222 The security objective Access control and authenticity for the Loader (O.Ctrl_Auth_Loader) is covered by the SFR as follows: 223 The SFR FDP_ACC.1/Loader defines the subjects, objects and operations of the Loader SFP enforced by the SFR FTP_ITC.1, FDP_UCT.1, FDP_UIT.1 and FDP_ACF.1/Loader. 224 The SFR FTP_ITC.1 requires the TSF to establish a trusted channel with assured identification of its end points and protection of the channel data from modification or disclosure. 225 The SFR FDP_UCT.1 requires the TSF to receive data protected from unauthorised disclosure. 226 The SFR FDP_UIT.1 requires the TSF to verify the integrity of the received user data. 227 The SFR FDP_ACF.1/Loader requires the TSF to implement access control for the Loader functionality. 228 The FCS_COP.1/TDES meets the security objective ―Cryptographic service Triple-DES (O.TDES)‖. 229 The FCS_COP.1/AES meets the security objective ―Cryptographic service AES (O.AES)‖. 230 The security functional requirement(s) ―Cryptographic operation (FCS_COP.1/RSA,FCS_COP.1/ECDSA,ECDH)‖ exactly requires those functions to be implemented which are demanded by O.RSA or O.ECC. FCS_CKM.1 supports the generation of keys needed for this cryptographic operations(optional). Therefore, FCS_COP.1/RSA, FCS_COP.1/ECDSA, FCS_COP.1/ECDH, FCS_CKM.1/RSA and FCS_CKM.1/ ECDSA are suitable to meet the security objective. 231 The FCS_COP.1/SHA meet the security objective ―Cryptographic service SHA (O.SHA)‖. 232 The security objective ―Authentication to external entities (O.Authentication) is directly covered by the SFR FIA_API.1.. 233 The justification related to the security objective ―Area based Memory Access Control (O.Mem-Access)‖ is as follows: 234 The security functional requirement ―Subset access control (FDP_ACC.1)‖ with the related Security Function Policy (SFP) ―Memory Access Control Policy‖ exactly require the implementation of an area based memory access control, which is a requirement from O.Mem-Access. Therefore, FDP_ACC.1 with its SFP is suitable to meet the security objective. 235 The security functional requirement ―Static attribute initialisation (FMT_MSA.3)‖ requires that the TOE provides default values for the security attributes. Since the TOE is a hardware platform these default values are generated by the reset procedure. Therefore FMT_MSA.3 is suitable to meet the security objective O.Mem-Access. 236 The security functional requirement ―Management of security attributes (FMT_MSA.1)‖ requires that the Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 86/105 ability to change the security attributes is restricted to privileged subject(s). It ensures that the access control required by O.Mem-Access can be realised using the functions provided by the TOE. Therefore FMT_MSA.1 is suitable to meet the security objective O.Mem_Access. 237 Finally, the security functional requirement ―Specification of Management Functions (FMT_SMF.1)‖ is used for the specification of the management functions to be provided by the TOE as required by O.MEM_ACCESS. Therefore, FMT_SMF.1 is suitable to meet the security objective O.Mem_Access. 238 The justification related to the security objective ―Protection during Packaging, Finishing and Personalisation (OE.Process-Sec-IC)‖ is as follows: 239 The Composite Product Manufacturer has to use adequate measures to fulfil OE.Process-Sec-IC. Depending on the security needs of the application, the Security IC Embedded Software may have to support this for instance by using appropriate authentication mechanisms for personalisation functions. 6.3.2 Dependencies of Security Functional Requirements 240 Table 8 below lists the security functional requirements defined in this Protection Profile, their dependencies and whether they are satisfied by other security requirements defined in this Protection Profile. The text following the table discusses the remaining cases. Security Functional Requirement Dependencies Fulfilled by security requirements FRU_FLT.2 FPT_FLS.1 Yes FPT_FLS.1 None No dependency FMT_LIM.1 FMT_LIM.2 Yes FMT_LIM.2 FMT_LIM.1 Yes FAU_SAS.1 None No dependency FDP_SDC.1 None No dependency FDP_SDI.2 None No dependency FPT_PHP.3 None No dependency FDP_ITT.1 FDP_ACC.1 or FDP_IFC.1 Yes FDP_IFC.1 FDP_IFF.1 See discussion below FPT_ITT.1 None No dependency FCS_RNG.1/ PTG.2 None No dependency FCS_RNG.1/RGS_B1 None No dependency FCS_RNG.1/EHP None No dependency FCS_COP.1 /TDES FCS_CKM.4 Yes (by environment, see discussion below) FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1) or FCS_CKM.1 Yes (by environment, see discussion below) FCS_COP.1 /AES FCS_CKM.4 Yes (by environment, see discussion below) FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1) or Yes (by environment, see Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 87/105 Security Functional Requirement Dependencies Fulfilled by security requirements FCS_CKM.1 discussion below) FCS_CKM.1 /RSA (optional) FCS_COP.1 or FCS_CKM.2 FCS_CKM.4 Yes FCS_COP.1/RSA (optional) FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1 FCS_CKM.4 Yes FCS_COP.1/ECDSA (optional) FDP_ITC.1 or FDP_ITC.2 or FCS_CKM.1 FCS_CKM.4 Yes FCS_COP.1/ECDH (optional) FDP_ITC.1 or FDP_ITC.2, or FCS_CKM.1 FCS_CKM.4 Yes FCS_CKM.1 /ECDSA (optional) FCS_COP.1 or FCS_CKM.2 FCS_CKM.4 Yes FCS_COP.1/SHA (optional) FDP_ITC.1 or FDP_ITC.2 Yes FDP_ACC.1 FDP_ACF.1 Yes FDP_ACF.1 FDP_ACC.1 FMT_MSA.3 Yes Yes FMT_MSA.3 FMT_MSA.1 FMT_SMR.1 Yes See discussion below FMT_MSA.1 FDP_ACC.1 or FDP_IFC.1 FMT_SMR.1 FMT_SMF.1 Yes See discussion below Yes FMT_SMF.1 None No dependency FMT_LIM.1/Loader FMT_LIM.2 Yes FMT_LIM.2/Loader FMT_LIM.1 Yes FTP_ITC.1 None No dependency FDP_UCT.1 FTP_ITC.1 or FTP_TRP.1, FDP_ACC.1 or FDP_IFC.1 Yes FDP_UIT.1 FTP_ITC.1 or FTP_TRP.1, FDP_ACC.1 or FDP_IFC.1 Yes FDP_ACC.1/ Loader FDP_ACF.1 Yes FDP_ACF.1/ Loader FMT_MSA.3 Yes FIA_API.1 None No dependency Table 8 Dependencies of the Security Functional Requirements Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 88/105 241 Part 2 of the Common Criteria defines the dependency of FDP_IFC.1 (information flow control policy statement) on FDP_IFF.1 (Simple security attributes). The specification of FDP_IFF.1 would not capture the nature of the security functional requirement nor add any detail. As stated in the Data Processing Policy referred to in FDP_IFC.1 there are no attributes necessary. The security functional requirement for the TOE is sufficiently described using FDP_ITT.1 and its Data Processing Policy (FDP_IFC.1). Therefore the dependency is considered satisfied. 242 In particular the security functional requirements providing resistance of the hardware against manipulations (e. g. FPT_PHP.3) support all other more specific security functional requirements (e. g. FCS_RNG.1) because they prevent an attacker from disabling or circumventing the latter. Together with the discussion of the dependencies above this shows that the security functional requirements build a mutually supportive whole. 243 The functional requirements FCS_CKM.1 and FCS_CKM.4 which are dependent to FCS_COP.1/DES and FCS_COP.1/AES are not included in this Security Target since the TOE only provides an engine for encryption and decryption. But the Security IC Embedded Software may fulfill these requirements related to the needs of the implemented application. The dependent requirements of FCS_COP.1/DES and FCS_COP.1/AES concerning these functions shall be fulfilled by the environment (Security IC Embedded Software). 244 The TOE provides the cryptographic key generation for RSA and ECDSA by the TOE (FCS_CKM.1/RSA, FCS_CKM.1/ECDSA), but it is up to the Smart Card Embedded Software’s security policy to adopt the cryptographic key generation by the TOE or use the cryptographic key generation by the Smart Card Embedded Software. The dependent requirements of FCS_COP.1/RSA and FCS_COP.1/ECDSA shall be fulfilled by the environment (Security IC Embedded Software). 245 The functional requirement FCS_CKM.1 which is dependent to FCS_COP.1/ECDH is not included in this Security Target. But the Security IC Embedded Software may fulfill this requirement related to the needs of the implemented application. The dependent requirements of FCS_COP.1/ECDH concerning this function shall be fulfilled by the environment (Security IC Embedded Software). 246 The functional requirement FCS_CKM.4 which is dependent to FCS_COP.1/RSA, FCS_COP.1/ECDH and FCS_COP.1/ECDSA are not included in this Security Target. But the Security IC Embedded Software may fulfill this requirement related to the needs of the implemented application. The dependent requirements of FCS_COP.1/RSA, FCS_COP.1/ECDH and FCS_COP.1/ECDSA concerning this function shall be fulfilled by the environment (Security IC Embedded Software). 247 Since SHA is a keyless algorithm, the dependencies FCS_CKM.1 and FMT_CKM.4 are not required. 248 The dependency FMT_SMR.1 introduced by the two components FMT_MSA.1 and FMT_MSA.3 is considered to be satisfied because the access control specified for the intended TOE is not role-based but enforced for each subject. Therefore, there is no need to identify roles in form of a security functional requirement FMT_SMR.1. 6.3.3 Rationale for the Assurance Requirements 249 The assurance level EAL6 and the augmentation with the requirement ASE_TSS.2 were chosen to demonstrate that the TOE fulfills the high-level Common Criteria requirements. An assurance level of EAL6 is required for this type of TOE since it is intended to defend against sophisticated attacks. This evaluation assurance level was selected since it is designed to permit a developer to gain maximum assurance from positive security engineering based on good commercial practices. In order to provide a meaningful level of assurance that the TOE provides an adequate level of defense against such attacks, the evaluators should Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 89/105 have access to the low level design and all the source code. 250 In addition, the TOE security policy is formally described and its security objective i.e. the complete memory access control is formally proved. The ASE_TSS.2 was chosen to demonstrate further assurance extensions provided by the TOE. 6.3.3.1 ADV_SPM.1 Formal TOE Security Policy Model 251 The formally modeled security policy consists of the complete TSF access control:  The access control to the security registers, the Flash, ROM regions and Booting memory area are correctly enforced.  The access control with respect to the MPU memory areas is correctly enforced, in particular:  The consistency of the memory areas is correctly enforced. 6.3.3.2 ASE_TSS.2 TOE Summary specification with architectural design summary 252 The augmentation ASE_TSS.2 is required in order to provide the potential users (e.g. the embedded software developers) with a succinct but comprehensive explanation on the TOE security functions that protect it against interference, logical tampering and bypass. This description is also necessary to establish the component ASE_TSS.2 for any composed TOE. 253 This assurance component is a higher hierarchical component to EAL6. ASE_TSS.2 has two dependencies (ASE_INT.1 and ASE_REQ.1) that both are satisfied by this TOE. 6.3.4 Security Requirements are Internally Consistent 254 The discussion of security functional requirements and assurance components in the preceding sections has shown that mutual support and consistency are given for both groups of requirements. The arguments given for the fact that the assurance components are adequate for the functionality of the TOE also shows that the security functional requirements and assurance requirements support each other and that there are no inconsistencies between these groups. 255 The security functional requirements FDP_SDC.1 and FDP_SDI.2 address the protection of user data in the specified memory areas against compromise and manipulation. The security functional requirement FPT_PHP.3 makes it harder to manipulate data. This protects the primary assets identified in Section 3.1 and other security features or functionality which use these data. 256 The security functional requirement FPT_PHP.3 makes it harder to manipulate data. This protects the primary assets and other security features or functionality which use these data. 257 Though a manipulation of the TOE (refer to FPT_PHP.3) is not of great value for an attacker in itself, it can be an important step in order to threaten the primary assets. Therefore, the security functional requirement FPT_PHP.3 is not only required to meet the security objective O.Phys-Manipulation. Instead it protects other security features or functions of both the TOE and the Security IC Embedded Software from being bypassed, deactivated or changed. In particular this may pertain to the security features or functions being specified using FDP_ITT.1, FPT_ITT.1, FPT_FLS.1, FMT_LIM.2, FCS_RNG.1, and those implemented in the Security IC Embedded Software. 258 A malfunction of TSF (refer to FRU_FLT.2 and FPT_FLS.1) can be an important step in order to threaten the primary assets. Therefore, the security functional requirements FRU_FLT.2 and FPT_FLS.1 are not Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 90/105 only required to meet the security objective O.Malfunction. Instead they protect other security features or functions of both the TOE and the Security IC Embedded Software from being bypassed, deactivated or changed. In particular this pertains to the security features or functions being specified using FDP_ITT.1, FPT_ITT.1, FMT_LIM.1, FMT_LIM.2, FCS_RNG.1, and those implemented in the Security IC Embedded Software. 259 In a forced leakage attack the methods described in ―Malfunction due to Environmental Stress‖ (refer to T.Malfunction) and/or ―Physical Manipulation‖ (refer to T.Phys-Manipulation) are used to cause leakage from signals which normally do not contain significant information about secrets. Therefore, in order to avert the disclosure of primary assets it is important that the security functional requirements averting leakage (FDP_ITT.1, FPT_ITT.1) and those against malfunction (FRU_FLT.2 and FPT_FLS.1) and physical manipulation (FPT_PHP.3) are effective and bind well. The security features and functions against malfunction ensure correct operation of other security functions (refer to above) and help to avert forced leakage themselves in other attack scenarios. The security features and functions against physical manipulation make it harder to manipulate the other security functions (refer to above). 260 Physical probing (refer to FPT_PHP.3) shall directly avert the disclosure of primary assets. In addition, physical probing can be an important step in other attack scenarios if the corresponding security features or functions use secret data. For instance the security functional requirement FMT_LIM.2 may use passwords. Therefore, the security functional requirement FPT_PHP.3 (against probing) help to protect other security features or functions including those being implemented in the Security IC Embedded Software. Details depend on the implementation. 261 Leakage (refer to FDP_ITT.1, FPT_ITT.1) shall directly avert the disclosure of primary assets. In addition, inherent leakage and forced leakage (refer to above) can be an important step in other attack scenarios if the corresponding security features or functions use secret data. For instance the security functional requirement FMT_LIM.2 may use passwords. Therefore, the security functional requirements FDP_ITT.1 and FPT_ITT.1 help to protect other security features or functions implemented in the Security IC Embedded Software (FDP_ITT.1) or provided by the TOE (FPT_ITT.1). Details depend on the implementation. 262 The User Data are treated as required to meet the requirements defined for the specific application context (refer to Treatment of User Data (A.Resp-Appl)). However, the TOE may implement additional functions. This can be a risk if their interface cannot completely be controlled by the Security IC Embedded Software. Therefore, the security functional requirements FMT_LIM.1 and FMT_LIM.2 are very important. They ensure that appropriate control is applied to the interface of these functions (limited availability) and that these functions, if being usable, provide limited capabilities only. 263 The combination of the security functional requirements FMT_LIM.1 and FMT_LIM.2 ensures that (especially after TOE Delivery) these additional functions cannot be abused by an attacker to (i) disclose or manipulate User Data, (ii) to manipulate (explore, bypass, deactivate or change) security features or functions of the TOE or of the Security IC Embedded Software or (iii) to enable an attack. Hereby the binding between these two security functional requirements is very important: 264 The security functional requirement Limited Capabilities (FMT_LIM.1) must close gaps which could be left by the control being applied to the function’s interface (Limited Availability (FMT_LIM.2)). Note that the security feature or function which limits the availability can be bypassed, deactivated or changed by physical manipulation or a malfunction caused by an attacker. Therefore, if Limited Availability (FMT_LIM.2) is vulnerable1, it is important to limit the capabilities of the functions in order to limit the possible benefit for an attacker. 265 The security functional requirement Limited Availability (FMT_LIM.2) must close gaps which could result from the fact that the function’s kernel in principle would allow to perform attacks. The TOE must limit the availability of functions which potentially provide the capability to disclose or manipulate User Data, to Public S3FT9MH_MV_MG ST Lite_Ver2.0 6 IT security requirements 91/105 manipulate security features or functions of the TOE or of the Security IC Embedded Software or to enable an attack. Therefore, if an attacker could benefit from using such functions1F, it is important to limit their availability so that an attacker is not able to use them. 266 No perfect solution to limit the capabilities (FMT_LIM.1) is required if the limited availability (FMT_LIM.2) alone can prevent the abuse of functions. No perfect solution to limit the availability (FMT_LIM.2) is required if the limited capabilities (FMT_LIM.1) alone can prevent the abuse of functions. Therefore, it is correct that both requirements are defined in a way that they together provide sufficient security. 267 It is important to avert malfunctions of TSF and of security functions implemented in the Security IC Embedded Software (refer to above). There are two security functional requirements which ensure that malfunctions cannot be caused by exposing the TOE to environmental stress. First it must be ensured that the TOE operates correctly within some limits (Limited fault tolerance (FRU_FLT.2)). Second the TOE must prevent its operation outside these limits (Failure with preservation of secure state (FPT_FLS.1)). Both security functional requirements together prevent malfunctions. The two functional requirements must define the ―limits‖. Otherwise there could be some range of operating conditions which is not covered so that malfunctions may occur. Consequently, the security functional requirements Limited fault tolerance (FRU_FLT.2) and Failure with preservation of secure state (FPT_FLS.1) are defined in a way that they together provide sufficient security. 268 The security functional requirements required to meet the security objectives O.Leak-Inherent, O.Phys- Probing, O.Malfunction, O.Phys-Manipulation and O.Leak-Forced protect the cryptographic algorithms (FCS_COP.1) and the cryptographic key generations (FCS_CKM.1). Therefore these security functional requirements support the secure implementation and operation of FCS_COP.1 and FCS_CKM.1. 269 Parts of the Smartcard IC Embedded Software may cause security violations by accidentally or deliberately accessing restricted data (which may include code). In order to avert the memory access violation it is important to the security functional requirement defining the scope where the Memory Access Policy is applied (FDP_ACC.1) and the security functional requirement defining the Memory Access Policy(FDP_ACF.1), and the security functional requirement ensuring the default value of security attribute(FMT_MSA.3) and the security functional requirement managing security attribute ( FMT_MSA.1) and the security functional requirement performing security management function(FMT_SMF.1) are effective and bind well. 270 Two refinements from the PP [5] have to be discussed here in the ST as the assurance level is increased. The refinement for ALC_CMS from the PP [5] can even be applied at the assurance level EAL 5 augmented with ALC_CMS.5. The assurance component ALC_CMS.4 is augmented to ALC_CMS.5 with aspects regarding the configuration control system for the TOE. The refinement is not touched. The refinement for ADV_FSP from the PP [5] can even be applied at the assurance level EAL 5 augmented with ADV_FSP.5. The assurance component ADV_FSP.4 is extended to ADV_FSP.5 with aspects regarding the description level. The level is increased from informal to semi-formal with informal description. The refinement is not touched by this measure. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 92/105 7 TOE SUMMARY SPECIFICATION 271 This chapter 7 TOE Summary Specification contains the following sections: 7.1 List of Security Functional Requirements Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 93/105 7.1 List of Security Functional Requirements SFR1: FPT_FLS.1: Failure with preservation of secure state 272 The detection thresholds of TOE’s detectors are inside the operating range of the TOE. Therefore abnormal events/failures are detected before the secure state is compromised. This allows to take User’s defined appropriate actions by software or to immediately RESET the TOE. 273 The secure state is maintained by TOE’s detectors. The TOE’s detectors are monitoring the failure occurs. If the failures are happen, the TOE goes into RESET state. This satisfies the FPT_FLS.1 ―Failure with preservation of secure state.‖ TOE’s Detectors 274 These functions records in register the events notified by the detectors. The software configures the reaction in case of detection: ● The TOE is immediately reset when an event is detected. ● Or, a special function register bit is set. TOE’s detectors are implemented by the hardware. The detection cannot be affected or bypassed by Smartcard Embedded Software. The reaction to the detection can be configured by the software. The influence on security and the way how to configure it is described in details in the S3FT9MH/S3FT9MV/S3FT9MG User’s Manual. Therefore, FPT_FLS.1 is implemented by TOE. 275 Security domains are maintained since accesses to the access-prohibited area are trapped by this access control function. SFR2: FRU_FLT.2: Limited fault tolerance 276 All operating signals are filtered/regulated in order to prevent malfunction. TOE’s Filters 277 These filters are used for preventing noise, glitches and extremely high frequency in the external reset or clock pad from causing undefined or unpredictable behavior of the chip. Integrity Checkers 278 These Integrity Checkers are used for preventing noise and laser from causing undefined or unpredictable behavior of the chip. 279 TOE’s filters and integrity checkers are implemented by the hardware. The filtering cannot be affected or bypassed by Smartcard Embedded Software. The reaction to the detection can be configured by the software. The influence on security and the way how to configure it is described in details in the S3FT9MH/S3FT9MV/S3FT9MG User’s Manual. Therefore, FRU_FLT.2 is implemented by TOE. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 94/105 SFR3: FPT_PHP.3: Resistance to physical attacks 280 This requirement is achieved by security feature as the shield must be removed and bypassed in order to perform physical intrusive attacks. The TOE makes a reset or FIQ occurs to stops operation if a physical manipulation or physical probing attack is detected of the TOE layout unpractical. So these functionalities meet the security functional requirement of FPT_PHP.3: Resistance to physical attack. SFR4: FDP_ACC.1: Subset access control 281 This requirement is achieved by security register access control, invalid address access and access right for the code executed in FLASH. 1) Security registers access control: This security function manages access to the security control registers through access control security attributes. 2) Invalid address access: This function detects invalid address access occurrence. 3) Access rights for the code executed in FLASH 4) Access control for Operating state: This security function select booting memory area. User can select ROM-BOOT or FLASH-BOOT 5) Flash protection about Write operation SFR5: FDP_ACF.1: Security attributes based access control. 282 This is covered by the Privilege and User modes of the TOE. SFR6: FMT_MSA.3: Static attribute initialization. 283 All Special Function Registers including MPU have DEFAULT values after Power on Reset. The access attribute of ROM and Flash memory have DEFAULT values. SFR7: FMT_MSA.1: Management of security attributes. 284 This is achieved with the MPU, OPRMON and CPAMON feature. The Memory Protection Unit (MPU) enables user to partition memory and set individual protection attributes for each partition. This allows the operating system to control the memory regions accessible by a User mode application process. The OPRMON enables user to ROM protection attributes. This allows the operating system to control the ROM regions accessible by a User mode application process. The CPAMON enables user to FLASH and set individual protection attributes. SFR8: FMT_SMF.1: Specification of management functions. 285 This is achieved via access to Special Function Registers of Memory Protection Unit(MPU). MPU provides Special Function Registers which defines the base address and the limit address for a partition. The Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 95/105 Registers exist for Flash, and RAM. Additional Registers exist for defining the protection attribute for each partition. SFR9: FAU_SAS.1: Audit Storage 286 This is fulfilled by the traceability/identification data written once and for all during the TEST mode of the manufacturing process. 1) Non-reversibility of TEST mode and NORMAL mode: This function disables the TEST mode and enables the NORMAL mode of the TOE. This function ensures the non-reversibility of the NORMAL mode. This function is used once during the manufacturing process. 2) TEST mode communication protocol and data commands: This function is the proprietary protocol used to operate the chip in TEST mode. This function enforces the identification and authentication of the TEST administrator during the test phase of the manufacturing process. 3) Functional Tests: During the manufacturing process, the operation of the TOE and the embedded software checksum are verified. This security function ensures the correct operation of the TOE security functions and the integrity of the embedded software. 4) Identification: During the TEST mode of manufacturing process, traceability data are written in the non- volatile memory of the TOE. Once the TOE is switched from TEST to NORMAL mode, those traceability data are READ ONLY and cannot be modified anymore. In particular, user can identify the version of device Dedicated SW part. The Bootloader, DTRNG FRO library, EHP DTRNG FRO library and RSA/ECC library version are identified by the version function in the library. This enables to identify and track the TOE during the rest of its life. SFR10: FMT_LIM.1: Limited capabilities 287 TEST mode can be accessed only by the TEST administrator by supplying an authentication password through a proprietary protocol. Once the TOE is changed to NORMAL mode, TEST mode functions are no more available for NORMAL mode. SFR11: FMT_LIM.2: Limited availabilities 288 TEST mode can be accessed only by the TEST administrator by supplying an authentication password through a proprietary protocol. Once the TOE is changed to NORMAL mode, TEST mode commands are no more available for NORMAL mode. Functional test during manufacturing process is only available for TEST mode only. SFR12: FDP_IFC.1: Subset information flow control 289 Memory Encryption: This is achieved by the function protects the memory contents of the TOE from data analysis on the stored data as well as on internally transmitted data. Shield: This requirement is achieved by security feature as the Shield must be removed and bypassed in order to perform physical intrusive attacks. Life cycle detector: Life cycle detector detects if detector signals are modified or not. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 96/105 SFR13: FDP_ITT.1: Basic internal transfer protection 290 This requirement is achieved by the combination of the TOE security features TOE features 1) to 5) as it is unpractical to get access to internal signals and interpret them. 1) Static Address/Data scrambling for bus and memory: This function protects memory and address/data bus from probing attacks. 2) Dynamic Data encryption for bus: This function protects data bus from probing attacks. 3) Memory encryption: This security function protects the memory contents of the TOE from data analysis on the stored data as well as on internally transmitted data. 4) Synthesizable processor core: The Central Processing Unit (CPU) of the TOE is synthesizable with glue logic, which makes reverse engineering and signal identification more difficult. 5) De-synchronization and signal-to-noise ratio reduction mechanisms: The TOE operations can be made asynchronous. They make a full range of intrusive (e.g. probing attacks) and non intrusive attacks (e.g. side-channel attacks) more complex and difficult. SFR14: FPT_ITT.1: Basic internal TSF data transfer protection 291 This requirement is achieved by the combination of the TOE security features TOE features 1) to 5) as it is unpractical to get access to internal signals and interpret them. 1) Static Address/Data scrambling for bus and memory: This function protects memory and address/data bus from probing attacks. 2) Dynamic Data encryption for bus: This function protects data bus from probing attacks. 3) Memory encryption: This security function protects the memory contents of the TOE from data analysis on the stored data as well as on internally transmitted data. 4) Synthesizable processor core: The Central Processing Unit (CPU) of the TOE is synthesizable with glue logic, which makes reverse engineering and signal identification more difficult. 5) De-synchronization and signal-to-noise ratio reduction mechanisms: The TOE operations can be made asynchronous. They make a full range of intrusive (e.g. probing attacks) and non intrusive attacks (e.g. side-channel attacks) more complex and difficult. SFR15: FCS_RNG.1: Random number generation FCS_RNG.1/PTG.2 292 This requirement is ensured by the design of the random number generation algorithm that makes use of Digital True Random Number Generator (DTRNG FRO) and the associated DTRNG FRO library conforming to BSI-AIS31 Class PTG.2 requirements (German scheme). FCS_RNG.1/RGS_B1 293 This requirement is ensured by the design of the random number generation algorithm that makes use of Digital True Random Number Generator (DTRNG FRO) and the associated DTRNG FRO library conforming to some of ANSSI RGS_B1 requirements (French scheme). SFR16: FCS_COP.1: Cryptographic operation 294 This requirement is covered by the TOE. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 97/105 Triple Data Encryption Standard Engine 295 This function is used for encrypting and decrypting data using the Triple DES symmetric algorithm with 112bit or 168bit key size. (FCS_COP.1/TDES) AES (Advanced Encryption Standard) 296 This function supports the AES operation with 128 bit, 192bit and 256bit key size. (FCS_COP.1/AES) TORNADO-E RSA Cryptographic Library as part of Secure RSA/ECC library (optional) This function assists in the acceleration of modulo exponentiations required in the RSA encryption/decryption algorithm. (FCS_COP.1/RSA) TORNADO-E is a high speed modular multiplication coprocessor for the support of the RSA public key cryptosystem. The TORNADO-E RSA Library is the software built on the TORNADO-E coprocessor that provides high level interface for RSA-based algorithms. The functions of the library included in the evaluation are:  TND_RSA_SigSTD_Secure (RSA signature generation with the standard method)  TND_RSA_SigCRT_Secure (RSA signature generation with CRT method)  TND_RSA_Verify (RSA signature verification) This function performs the RSA signature verification. Since this function uses only the public information, it does not implement any dedicated countermeasures against the side-channel attacks.  RSA_R2modM_precompute_sec (R^2 value precomputation for the standard RSA) This function calculates the R^2 value for the Montgomery constant R, which will then be used for the subsequent standard RSA operations.  RSA_R2modPandQ_precompute_sec (R^2 value precomputation for the CRT RSA) This function calculates the R^2 value for the Montgomery constant R, which will then be used for the subsequent CRT RSA operations. The TND_RSA_SigSTD_Secure and TND_RSA_SigCRT_Secure have some countermeasure against the timing attack, SPA, DPA and the fault attack. The RSA_R2modM_precompute_sec and RSA_R2modPandQ_precompute_sec functions implement some countermeasures against the fault attack. TORNADO-E ECC Cryptographic Library as part of Secure RSA/ECC library (optional) This function assists in the acceleration of required for the ECC cryptographic operations including the ECDSA signature generation/verification and the ECDH secret key derivation. (FCS_COP.1/ECDSA and FCS_COP.1/ECDH) TORNADO-E RSA/ECC library provides a set of functions to implement elliptic curve cryptographic algorithms. In particular, it provides some functions to implement the ECDSA signature generation/verification and the ECDH secret key derivation. The functions of the library included in the evaluation are:  ECDSA_sign_digest  ECDSA_verify_digest  ECDH_generate . The functions ECDSA_sign_digest and ECDH_generate have some countermeasure against the timing attack, SPA and the fault attack. The ECDSA_verify_digets function has some countermeasures against the fault attack. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 98/105 The TORNADO-E Secure RSA/ECC library provides the functions to calculate hash (digest) values using the SHA1, SHA224, SHA256, SHA384 and SHA 512 algorithm as specified in [FIPS PUB 180-3], but only the functions related to SHA224, SHA256, SHA384 and SHA512 listed below are in the scope of this evaluation:  SHA224_init, SHA224_update, SHA224_final,  SHA256_init, SHA256_update, SHA256_final.  SHA384_init, SHA384_update, SHA384_final.  SHA512_init, SHA512_update, SHA512_final. . SFR17: FCS_CKM.1: Cryptographic key generation This requirement is covered by the TOE for the RSA/ECC key generation. (optional) RSA_KeyGen_Secure - FCS_CKM.1/RSA.  This function generates an RSA public/private key pair. ECDSA_keygen - FCS_CKM.1/ECDSA.  This function generates an ephemeral or static public/private key. SFR18: Limited capabilities - Loader(FMT_LIM.1/Loader) This requirement is achieved by the changing the Operating Mode Selection from ROM Booting mode to Flash Booting mode and then locking. If the chip is to be locking to Flash Reset mode, Deploying Loader functionality does not allow stored user data to be disclosed or manipulated. SFR19: Limited availability – Loader (FMT_LIM.2/Loader) This requirement is achieved by the changing the Operating Mode Selection from ROM Booting mode to Flash Booting mode and then locking. The Bootloader is only supported in ROM Booting mode. In Flash Booting mode, the Bootlaoder doesn’t operate. SFR20: Inter-TSF trusted channel (FTP_ITC.1) This requirement is achieved by processing the Authentication sequence. This channel is only distinct from other communication channels and provides assured identification for its end points and protection of the channel data from modification or disclose. SFR21: Basic data exchange confidentiality (FDP_UCT.1) This requirement is achieved by secure writing. User data which is loaded to flash memory is encrypted data.. SFR22: Data exchange integrity (FDP_UIT.1) This requirement is achieved by appropriate code integrity mechanism. SFR23: Subset access control - Loader (FDP_ACC.1/ Loader) This requirement is achieved by following functions. ROM hiding function: The attribute of ROM is changed from Accessible ROM to Inaccessible ROM. Flash memory attribute as Read only Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 99/105 SFR24: Security attribute based access control - Loader (FDP_ACF.1/Loader) This is covered by the ROM Booting(ROM Reset) and Flash Booting(Flash Reset) mode of the TOE. TOE can be set to ROM Booting(ROM Reset) and FLASH Booting(FLASH Reset) mode domains exclusively. All Bootloader APDU commands are accessible only in Rom Booting mode. The Flash Booting mode can not access all Bootloader APDU commands. SFR25: Stored data confidentiality (FDP_SDC.1) This requirement is achieved by the combination of the TOE security features TOE features 1) to 4) as it is unpractical to get access to internal signals and interpret them. 1) Static Address/Data scrambling for bus and memory: This function protects memory and address/data bus from probing attacks. 2) Data encryption for bus: This function protects data bus from probing attacks. 3) Memory encryption: This security function protects the memory contents of the TOE from data analysis on the stored data as well as on internally transmitted data. The algorithms used for encryption are proprietary. The ROM encryption is static key while the RAM and the FLASH encryption is dynamic key. RAM encryption is performed automatically while FLASH encryption is defined and managed by the embedded software. The key size for FLASH encryption is 16-byte. 4) Invalid address access: This function detects invalid address access occurrence. 5) Shield: This requirement is achieved by security feature as the shield must be removed and bypassed in order to perform physical intrusive attacks. 6) Life cycle detector: Life cycle detector detects if detector signals are modified or not. 7) Filters. 8) Non-reversibility of TEST and NORMAL modes: This function disables the TEST mode and enables the NORMAL mode of the TOE. This function ensures the non-reversibility of the NORMAL mode. This function is used once during the manufacturing process 9) Control of Booting mode: This requirement is achieved by the changing the Operating Mode Selection. SFR26: Stored data integrity monitoring and action (FDP_SDI.2) This requirement is achieved by following functions. Flash/RAM: Error management features. SFR27: Authentication Proof of Identity (FIA_API.1) This requirement is achieved by processing the Authentication sequence. SFR28: FCS_RNG.1/EHP: Alternative Random number generation This requirement is ensured by the design of the random number generation algorithm that makes use of Digital True Random Number Generator (DTRNG FRO) and the associated EHP DTRNG FRO library. The generated random numbers pass AIS31 statistical tests (Test Procedure A) provided by BSI AIS31 metric. Public S3FT9MH_MV_MG ST Lite_Ver2.0 7 TOE SUMMARY SPECIFICATION 100/105 7.2 Architectural Design Summary 297 The TOE claims the assurance requirement ASE_TSS.2, the security architectural information on a very high level is included in the TSS to inform the embedded software developers on how the TOE protects itself against interference, logical tampering and bypass. 298 Interference 299 Interference consists in interfering in the TSF in order to get access to assets. 300 Logical tampering 301 Logical tampering consists in get access to the assets by a logical means (in contrast with physical tampering). For this TOE, logical tampering may be used on  the access control  the information flow control 302 The access control is enforced by the following security functions: ―Security registers access control‖, ―Invalid address access‖, ―Access rights for the code executed in FLASH‖, ―Access control for Operating state‖, ―Flash protection about Write operation‖. 303 The information flow control is enforced by the following security function ―Memory Encryption‖. 304 Bypass 305 Non-bypassability is a property that the security functionality of the TSF is always invoked. For this TOE, bypassing a security function may be caused by 306 A physical perturbation on the IC: protection against this bypass if ensured by the security functions ―Static Address/Data scrambling for bus and memory‖, ―Synthesizable processor core‖, ―Detectors‖, ―Filters‖ 307 Switching back from Normal mode to Test mode in order to get more privilege: protection against this bypass if ensured by the security functions ―Non-reversibility of TEST mode and NORMAL mode‖ 308 Masking the security errors: protection against this bypass if ensured by the security function ―Security registers access control‖ Public S3FT9MH_MV_MG ST Lite_Ver2.0 8 Annex 101/105 8 Annex 8.1 Glossary Application Data All data managed by the Security IC Embedded Software in the application context. Application data comprise all data in the final Security IC. Composite Product Integrator Role installing or finalising the IC Embedded Software and the applications on platform transforming the TOE into the unpersonalised Composite Product after TOE delivery. The TOE Manufacturer may implement IC Embedded Software delivered by the Security IC Embedded Software Developer before TOE delivery (e.g. if the IC Embedded Software is implemented in ROM or is stored in the non-volatile memory as service provided by the IC Manufacturer or IC Packaging Manufacturer) Composite Product Manufacturer The Composite Product Manufacturer has the following roles (i) the Security IC Embedded Software Developer (Phase 1), (ii) the Composite Product Integrator (Phase 5) and (iii) the Personaliser (Phase 6). If the TOE is delivered after Phase 3 in form of wafers or sawn wafers (dice) he has the role of the IC Packaging Manufacturer (Phase 4) in addition. End-consumer User of the Composite Product in Phase 7. IC Dedicated Software IC proprietary software embedded in a Security IC (also known as IC firmware) and developed by the IC Developer. Such software is required for testing purpose (IC Dedicated Test Software) but may provide additional services to facilitate usage of the hardware and/or to provide additional services (IC Dedicated Support Software). IC Dedicated Test Software That part of the IC Dedicated Software (refer to above) which is used to test the TOE before TOE Delivery but which does not provide any functionality thereafter. IC Dedicated Support Software That part of the IC Dedicated Software (refer to above) which provides functions after TOE Delivery. The usage of parts of the IC Dedicated Software might be restricted to certain phases. Initialisation Data Initialisation Data defined by the TOE Manufacturer to identify the TOE and to keep track of the Security IC’s production and further life-cycle phases are considered as belonging to the TSF data. These data are for instance used for traceability and for TOE identification (identification data). Integrated Circuit (IC) Public S3FT9MH_MV_MG ST Lite_Ver2.0 8 Annex 102/105 Electronic component(s) designed to perform processing and/or memory functions. Pre-personalisation Data Any data supplied by the Card Manufacturer that is injected into the non-volatile memory by the Integrated Circuits manufacturer (Phase 3). These data are for instance used for traceability and/or to secure shipment between phases. Security IC Composition of the TOE, the Security IC Embedded Software, User Data and the package (the Security IC carrier). Security IC Embedded Software Software embedded in a Security IC and normally not being developed by the IC Designer. The Security IC Embedded Software is designed in Phase 1 and embedded into the Security IC in Phase 3 or in later phases of the Security IC product life-cycle. Some part of that software may actually implement a Security IC application others may provide standard services. Nevertheless, this distinction doesn’t matter here so that the Security IC Embedded Software can be considered as being application dependent whereas the IC Dedicated Software is definitely not. Security IC Product Composite product which includes the Security Integrated Circuit (i.e. the TOE) and the Embedded Software and is evaluated as composite target of evaluation in the sense of the Supporting Document TOE Delivery The period when the TOE is delivered which is either (i) after Phase 3 (or before Phase 4) if the TOE is delivered in form of wafers or sawn wafers (dice) or (ii) after Phase 4 (or before Phase 5) if the TOE is delivered in form of packaged products. TOE Manufacturer The TOE Manufacturer must ensure that all requirements for the TOE and its development and production environment are fulfilled. The TOE Manufacturer has the following roles: (i) IC Developer (Phase 2) and (ii) IC Manufacturer (Phase 3). If the TOE is delivered after Phase 4 in form of packaged products, he has the role of the (iii) IC Packaging Manufacturer (Phase 4) in addition. TSF data Data created by and for the TOE, that might affect the operation of the TOE. This includes information about the TOE’s configuration, if any is coded in non-volatile non-programmable memories (ROM), in specific circuitry, in non-volatile programmable memories (for instance E2PROM) or a combination thereof. User data All data managed by the Smartcard Embedded Software in the application context. User data comprise all data in the final Smartcard IC except the TSF data. 8.2 Abbreviations Public S3FT9MH_MV_MG ST Lite_Ver2.0 8 Annex 103/105 CC Common Criteria EAL Evaluation Assurance Level IT Information Technology PP Protection Profile ST Security Target TOE Target of Evaluation TSC TSF Scope of Control TSF TOE Security Functionality TSFI TSF Interface TSP TOE Security Policy Public S3FT9MH_MV_MG ST Lite_Ver2.0 8 Annex 104/105 8.3 References [1] Common Criteria, Part 1: Common Criteria for Information Technology Security Evaluation, Part 1: Introduction and General Model, Version 3.1, Revision 4, September 2012, CCMB-2012-09-001 [2] Common Criteria, Part 2: Common Criteria for Information Technology Security Evaluation, Part 2: Security Functional Components, Version 3.1, Revision 4, September 2012, CCMB-2012-09-002 [3] Common Criteria, Part 3: Common Criteria for Information Technology Security Evaluation, Part 3: Security Assurance Components, Version 3.1, Revision 4, September 2012, CCMB-2012-09-003 [4] Common Methodology for Information Technology Security Evaluation, Evaluation Methodology, Version 3.1, Revision 4, September 2012, CCMB-2012-09-004 [5] Eurosmart Security IC Platform Protection Profile with Augmentation Packages, Version 1.0, BSI-CC-PP-0084- 2014. [6] AIS31: Functionality classes and evaluation methodology for true (physical) random number generators, Version 1, 25.09.2001, Bundesamt für Sicherheit in der Informationstechnik [7] A proposal for: Functionality classes for random number generators, Version 2.0, 18.09.2011, Bundesamt für Sicherheit in der Informationstechnik [8] ALGO: Federal Gazette No 19, Notification in accordance with the Electronic Signatures Act and the Electronic Signatures Ordinance (overview of suitable algorithms), Federal Network Agency for Electricity, Gas, Telecommunications, Post and Railway, 2008-11-17 [9] [FIPS SP800-67] Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher, version 1.1 [10] [FIPS 197] Advanced Encryption Standard (AES), 2001-11-26 [11] [ISO/IEC 14888-2:2008] - Information technology -- Security techniques-- Digital signatures with appendix -- Part 2: Integer factorization based mechanisms. [12] CC Supporting Document, Mandatory Technical Document, "Application of Attack Potential to Smartcards": version 2.9 (January 2013) as recommended by SOG-IS. [13] [ANS X9.62] American National Standard X9.62-2005, Public Key Cryptography for the Financial Services Industry, The Elliptic Curve Digital Signature Algorithm (ECDSA), November 16, 2005. [14] [ANS X9.63] American National Standard X9.63-2001, Public Key Cryptography for the Financial Services Industry: Key Agreement and Key Transport Using Elliptic Curve Cryptography, November 20, 2001 [15] [FIPS PUB 180-3] U.S. Department of Commerce / National Bureau of Standards, Secure Hash Algorithm, FIPS PUB 180-3, 2008-October [16] [Brainpool curves] ECC Brainpool Standard Curves and Curve generation, M. Lochter, v1.0, www.ecc- brainpool.org [17] [NIST curves] Federal Information Processing Standards Publication FIPS PUB 180-3, Digital Signature Standard; U.S. department of Commerce / National Institute of Standards and Technology (NIST), June 2009 [18] [SEC-recommended curves] SEC2: Recommended Elliptic Curve Domain Parameters, Certicom Research, v1.0, September 20, 2000. [19] [ETSI TS 102 176-1] Electronic Signatures and Infrastructures (ESI); Algorithms and Parameters for Secure Electronic Signatures; Part 1: Hash functions and asymmetric algorithms, 2007-11, version 2.0.0 [20] [SCA on Prime Gen] T. Finke, M. Gebhardt and W. Schindler, A New Side-Channel Attack on RSA Prime Generation, CHES 2009, LNCS 5747, pp. 141-155, 2009. [17] [NIST curves] Federal Information Processing Standards Publication FIPS PUB 180-3, Digital Signature Standard; U.S. department of Commerce / National Institute of Standards and Technology (NIST), June 2009 [18] [SEC-recommended curves] SEC2: Recommended Elliptic Curve Domain Parameters, Certicom Research, v1.0, September 20, 2000. [19] [ETSI TS 102 176-1] Electronic Signatures and Infrastructures (ESI); Algorithms and Parameters for Secure Electronic Signatures; Part 1: Hash functions and asymmetric algorithms, 2007-11, version 2.0.0 Public S3FT9MH_MV_MG ST Lite_Ver2.0 8 Annex 105/105 [20] [SCA on Prime Gen] T. Finke, M. Gebhardt and W. Schindler, A New Side-Channel Attack on RSA Prime Generation, CHES 2009, LNCS 5747, pp. 141-155, 2009. [21] Les règles et recommandations concernant le choix et le dimensionnement de mécanismes cryptographiques. Annexe B1 du RGS 2.0. Version 2.03, 21/02/2014, ANSSI. http://www.ssi.gouv.fr/uploads/2015/01/RGS_v-2- 0_B1.pdf