Security Target Lite
M7793 A12 and G12
Including optional Software Libraries
RSA - EC - Toolbox
Version: 1.5
Date: 2013-11-22
Author: Steffen Heinkel
Chip Card and Security
Edition 2013-11-22
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2013 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or
any information regarding the application of the device, Infineon Technologies hereby disclaims any and all
warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual
property rights of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the
types in question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express
written approval of Infineon Technologies, if a failure of such components can reasonably be expected to
cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or
system. Life support devices or systems are intended to be implanted in the human body or to support and/or
maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the
user or other persons may be endangered.
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REVISION HISTORY
1.0 Initial Version
1.5 Final Version
Miscellaneous
The term "Mifare" in this document is only used as an indicator of product compatibility to the corresponding
established technology. This applies to the entire document wherever the term is used.
Trademarks of Infineon Technologies AG
AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™,
CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™,EconoBRIDGE™, EconoDUAL™,
EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™,
I²RF™,ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™,
ORIGA™,POWERCODE™; PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™,
RASIC™,
ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™,
TEMPFET™,thinQ!™, TRENCHSTOP™, TriCore™.
Other Trademarks
Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™,
KEIL™,PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed
by AUTOSARdevelopment partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum.
COLOSSUS™,FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.).
EPCOS™ of Epcos AG.FLEXGO™ of Microsoft Corporation. FlexRay™ is licensed by FlexRay Consortium.
HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale.
IrDA™ of Infrared Data Association Corporation. ISO™ of INTERNATIONALORGANIZATION FOR
STANDARDIZATION. MATLAB™ ofMathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc.
MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of
MIPSTechnologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™
(MWO) of Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc. Openwave™
Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius
Satellite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of
Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™
of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited.
VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated.
VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.
Last Trademarks Update 2011-11-11.
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TABLE OF CONTENTS
1 SECURITY TARGET INTRODUCTION (ASE_INT) ................................................................................. 6
1.1 SECURITY TARGET AND TARGET OF EVALUATION REFERENCE ............................................................... 6
1.2 TARGET OF EVALUATION OVERVIEW ..................................................................................................... 8
2 TARGET OF EVALUATION DESCRIPTION.......................................................................................... 10
2.1 TOE DEFINITION................................................................................................................................ 10
2.2 SCOPE OF THE TOE........................................................................................................................... 12
2.2.1 Hardware of the TOE............................................................................................................... 13
2.2.2 Firmware and Software of the TOE ......................................................................................... 14
2.2.3 Interfaces of the TOE............................................................................................................... 15
2.2.4 Guidance Documentation ........................................................................................................ 15
2.2.5 Forms of Delivery..................................................................................................................... 16
2.2.6 Production sites ....................................................................................................................... 16
2.2.7 TOE Configuration ................................................................................................................... 16
2.2.8 TOE initialization with Customer Software .............................................................................. 18
3 CONFORMANCE CLAIMS (ASE_CCL)................................................................................................. 19
3.1 CC CONFORMANCE CLAIM ................................................................................................................. 19
3.2 PP CLAIM .......................................................................................................................................... 19
3.3 PACKAGE CLAIM ................................................................................................................................ 19
3.4 CONFORMANCE RATIONALE................................................................................................................ 20
3.5 APPLICATION NOTES .......................................................................................................................... 21
4 SECURITY PROBLEM DEFINITION (ASE_SPD).................................................................................. 22
4.1 THREATS ........................................................................................................................................... 22
4.1.1 Additional Threat due to TOE specific Functionality................................................................ 22
4.1.2 Assets regarding the Threats................................................................................................... 23
4.2 ORGANIZATIONAL SECURITY POLICIES ................................................................................................ 24
4.2.1 Augmented Organizational Security Policy ............................................................................. 24
4.3 ASSUMPTIONS ................................................................................................................................... 25
4.3.1 Augmented Assumptions......................................................................................................... 26
5 SECURITY OBJECTIVES (ASE_OBJ) .................................................................................................. 27
5.1 SECURITY OBJECTIVES OF THE TOE ................................................................................................... 27
5.2 SECURITY OBJECTIVES FOR THE DEVELOPMENT AND OPERATIONAL ENVIRONMENT ............................... 28
5.2.1 Clarification of “Usage of Hardware Platform (OE.Plat-Appl)”................................................. 28
5.2.2 Clarification of “Treatment of User Data (OE.Resp-Appl)” ...................................................... 29
5.2.3 Clarification of “Protection during Composite product manufacturing (OE.Process-Sec-IC)” 29
5.3 SECURITY OBJECTIVES RATIONALE..................................................................................................... 29
6 EXTENDED COMPONENT DEFINITION (ASE_ECD)........................................................................... 32
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6.1 COMPONENT “SUBSET TOE SECURITY TESTING (FPT_TST)” .............................................................. 32
6.2 DEFINITION OF FPT_TST.2................................................................................................................ 32
6.3 TSF SELF TEST (FPT_TST)............................................................................................................... 33
6.4 FAMILY “GENERATION OF RANDOM NUMBERS (FCS_RNG)”............................................................... 33
6.5 DEFINITION OF FCS_RNG.1 .............................................................................................................. 34
7 SECURITY REQUIREMENTS (ASE_REQ)............................................................................................ 36
7.1 TOE SECURITY FUNCTIONAL REQUIREMENTS ..................................................................................... 36
7.1.1 Extended Components FCS_RNG.1 and FAU_SAS.1 ........................................................... 37
7.1.2 Subset of TOE testing.............................................................................................................. 39
7.1.3 Memory access control............................................................................................................ 40
7.1.4 Support of Cipher Schemes..................................................................................................... 44
7.1.5 Data Integrity............................................................................................................................ 50
7.2 TOE SECURITY ASSURANCE REQUIREMENTS...................................................................................... 52
7.2.1 Refinements............................................................................................................................. 53
7.3 SECURITY REQUIREMENTS RATIONALE ............................................................................................... 53
7.3.1 Rationale for the Security Functional Requirements ............................................................... 53
7.3.2 Rationale of the Assurance Requirements .............................................................................. 61
8 TOE SUMMARY SPECIFICATION (ASE_TSS)..................................................................................... 63
8.1 SF_DPM: DEVICE PHASE MANAGEMENT............................................................................................ 63
8.2 SF_PS: PROTECTION AGAINST SNOOPING.......................................................................................... 63
8.3 SF_PMA: PROTECTION AGAINST MODIFYING ATTACKS ....................................................................... 63
8.4 SF_PLA: PROTECTION AGAINST LOGICAL ATTACKS ............................................................................ 63
8.5 SF_CS: CRYPTOGRAPHIC SUPPORT .................................................................................................. 63
8.6 ASSIGNMENT OF SECURITY FUNCTIONAL REQUIREMENTS TO TOE’S SECURITY FUNCTIONALITY ............ 64
8.7 SECURITY REQUIREMENTS ARE INTERNALLY CONSISTENT.................................................................... 64
9 REFERENCES ........................................................................................................................................ 66
9.1 LITERATURE....................................................................................................................................... 66
10 APPENDIX........................................................................................................................................... 68
11 LIST OF ABBREVIATIONS ................................................................................................................ 70
12 GLOSSARY......................................................................................................................................... 72
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1 Security Target Introduction (ASE_INT)
1.1 Security Target and Target of Evaluation Reference
The title of this document is Security Target (ST). The Security Target comprises the Infineon Technologies
Security Controller M7793 A12 and G12 with optional RSA, EC and Toolbox libraries and with specific IC-
dedicated software.
The target of evaluation (TOE) M7793 A12 and G12 is described in the following sections. The Security
Target Lite has the revision 1.5 and is dated 2013-11-22.
The Target of Evaluation (TOE) is an Infineon Technologies Security Controller M7793 A12 and G12 with
optional RSA2048/4096 v1.02.010 or v1.02.013, EC v1.02.010 or v1.02.013 and Toolbox v1.02.010 or
v1.02.013 libraries and with specific IC-dedicated software.
The Security Target is based on the Protection Profile “Smartcard IC Platform Protection Profile” [1].
The Protection Profile and the Security Target are built in compliance to Common Criteria v3.1.
The ST takes into account all relevant current final interpretations.
The targeted certificate is EAL5+.
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Table 1: Identification
Version Date Registration
Security
Target
this version see cover
page
M7793 A12 and G12
M7793 A12 and G12
with Flash Loader V3.92.009
and Flash Loader patch version V3.93.004
and RMS V7790b0118
and STS V77.05.0d.06
and STS Patch V7206
and SAM V25b01
and Overall Patch v7048
and optional SW:
RSA2048 V1.02.010 or V1.02.013
RSA4096 V1.02.010 or V1.02.013
EC V1.02.010 or V1.02.013
Toolbox V1.02.010 or V1.02.013
and guidance documentation
Edition 2010-11 SLx 70 Family Hardware Reference Manual
2012-06 SLx 70 Family Production and Personalization
User's Manual
2013-03 SLE 70 Family Programmer’s Reference
User's Manual
2013-08 M7793 Security Guidelines User's manual
2013-07 M7790 M7791 M7793 M7794 Errata Sheet
2011-04 or
2011-06
SLE77 Asymmetric Crypto Library for
Crypto@2304T RSA/ECC/Toolbox User Interface
(optional)
2010-03 Crypto@2304T User Manual
Target of
Evaluation
A12
Guidance
Document
ation
A customer can identify the TOE and its configuration (for details see chapter 2.2.7) using the Non-ISO ATR
in combination with firmware functions. The TOE answers the Non-ISO-ATR with a Chip Identification Mode
(CIM). This CIM outputs a chip identifier byte, design step and firmware versions. The RMS base version and
configuration of the TOE (memory size and available peripherals) can be obtained by dedicated RMS
functions. The Flash Loader offers a function to extract its version.
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1.2 Target of Evaluation Overview
The TOE comprises the Infineon Technologies SmartCard IC (Security Controller) M7793 A12 and G12 with
specific IC-dedicated software and optional RSA, EC and Toolbox libraries.
This Security Target (ST) describes the TOE known as the Infineon Technologies AG security controller
group as listed in Table 1 and gives a summary product description.
The TOE is a member of the Security Controller family SLE70 and meets high requirements in terms of
performance and security.
The major components of the core system are the CPU, the MMU (Memory Management Unit) and MED
(Memory Encryption/Decryption Unit). The TOE implements a 16-MByte linear addressable memory space, a
simple scaleable Memory Management concept and a scaleable stack size. The flexible memory concept
consists of ROM and SOLID FLASH™ NVM.
The RMS library providing some functionality via an API to the Smartcard Embedded Software contains, for
example, SOLID FLASH™ NVM service routines. The service algorithm provides functionality for the tearing-
safe writing to the SOLID FLASH™ NVM. The STS firmware is used for test purposes during startup and the
Flash Loader allows downloading of user software to the SOLID FLASH™ NVM during the manufacturing
process. The STS resides in a dedicated test ROM area, that is part of the TOE.
The TRNG (True Random Number Generator) is a physical random number generator and meets the
requirements of the functionality class PTG.2 of [6].
The symmetric coprocessor (SCP) combines both AES and triple DES with dual-key or triple-key hardware
acceleration. The asymmetric crypto coprocessor, called Crypto2304T in the following, supports RSA-2048
bit (4096-bit with CRT) and Elliptic Curve (EC) cryptography, for example.
The software part of the TOE consists of the cryptographic libraries RSA and EC and the supporting Toolbox
and Base libraries. If RSA or EC or Toolbox is part of the shipment, the Base Library is automatically
included.
The RSA library is used to provide a high-level interface to RSA (Rivest, Shamir, Adleman) cryptography
implemented on the hardware component Crypto2304T and includes countermeasures against SPA, DPA
and DFA attacks. The routines are used for the generation of RSA key pairs (RsaKeyGen), RSA signature
verification (RsaVerify), RSA signature generation (RsaSign) and RSA modulus recalculation (RsaModulus).
The hardware Crypto2304T unit provides the basic long number calculations (add, subtract, multiply, square
with 1100 bit numbers) with high performance. The RSA library is delivered as object code. The RSA library
can perform RSA operations from 512 to 4096 bits. Following the BSI1 recommendations, key lengths below
1976 bits are not included in the certificate.
1 BSI Bundesamt für Sicherheit in der Informationstechnik – Federal office for information security.
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The EC library is used to provide a high level interface to Elliptic Curve cryptography and includes
countermeasures against SPA, DPA and DFA attacks. The routines are used for ECDSA signature
generation, ECDSA signature verification, ECDSA key generation and Elliptic Curve Diffie-Hellman key
agreement. The EC library is delivered as object code. The certificate covers the standard NIST [14] and
Brainpool [15] Elliptic Curves with key lengths of 160, 163, 192, 224, 233, 256, 283, 320, 384, 409, 512 or
521 bits. Other types of elliptic curves can be added by the user during a composite certification process.
The Toolbox library provides long integer and modular arithmetic operations. It does not support any
security-relevant policy or function.
RSA, EC and Toolbox library are delivery options. For each library two versions are part of the ST as defined
in Table 1. A user can choose either one of them, in case a library is part of the delivery.
The Base Library provides the low-level interface to the asymmetric cryptographic coprocessor for the
cryptographic libraries and has no user interface. It does not support any security relevant policy or function.
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2 Target of Evaluation Description
The TOE description helps the reader to understand the specific security environment and the security
policy.
2.1 TOE Definition
The TOE consists of smartcard ICs (Security Controllers) meeting the highest requirements in terms of
performance and security. They are manufactured by Infineon Technologies AG in a 90 nm CMOS
technology (L90FL). This TOE is intended to be used in smartcards and for its previous use as a
development platform for smartcard operating systems according to the lifecycle model from [1]
The term Smartcard Embedded Software is used in the following for all operating systems and applications
stored and executed on the TOE. The TOE is the platform for the Smartcard Embedded Software. The
Smartcard Embedded Software itself is not part of the TOE.
Figure 1 shows the block diagram of the M7793:
Figure 1: Block diagram of the TOE
Memories
IFX ROM
Solid FlashTM
NVM
RAM
Coprocessors
SCP
Peripherals
2x timer
& WDT
CRC
UART
Security Peripherals
Voltage
Regulator
UMSLC
Core
MMU
MED
ICO
Power
Mgmt.
IMM
Cache
Peripheral Bus (16 Bit)
Crypto@2304T Sensors
Filters
CPU
ITP
ICU/PEC
PRNG TRNG
Memory Bus (32 Bit)
The TOE consists of a core system, memories, coprocessors, peripherals, security modules and analog
peripherals. The major components of the core system are the non-standard CPU, the MMU (Memory
Management Unit) and MED (Memory Encryption/Decryption Unit). The coprocessor block contains the
processors for RSA/EC and 3DES/AES processing, while the peripheral block contains the random number
generation and the external interfaces service. The peripheral block also contains also the timers and a
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watchdog. All data of the memory block is encrypted, RAM and ROM are equipped with an error detection
code and the SOLID FLASH™ NVM is equipped with an error correction code (ECC). Security modules
manage the alarms. Alarms may be triggered when the environmental conditions are outside the specified
operational range.
The CPU accesses memory via the integrated Memory Encryption and Decryption unit (MED). The access
rights of the application to the memories can be controlled via the memory management unit (MMU). Errors
in RAM and ROM are automatically detected (EDC, Error Detection Code) in terms of the SOLID FLASH™
NVM 1-Bit-errors are also corrected (ECC, Error Correction Code).
The controller of this TOE stores both code and data in a linear 16-Mbyte memory space, allowing direct
access without the need to swap memory segments in and out of memory using a memory management
unit.
The cache is a high-speed memory buffer located between the CPU and (external) main memories holding a
copy of some of the memory contents to enable fast access.
The TRNG (True Random Number Gerenator) is specially designed for smartcard applications. The TRNG
fulfils the requirements of the functionality class PTG.2 of [6] and produces genuine random numbers which
then can be used directly or as seed for the PRNG (Pseudo Random Number gerenator). The PRNG is not
in the scope of the evaluation.
The implemented sleep mode logic (clock stop mode per ISO/IEC 7816-3) is used to reduce the overall
power consumption. The timer permits easy implementation of communication protocols such as T=1 and all
other timing-critical operations. The UART-controlled I/O interface allows the smartcard controller and the
terminal interface to be operated independently.
The Clock Unit (CLKU) supplies the clocks for all components of the TOE. The Clock Unit can work in an
internal and external clock mode. When operating in the internal clock mode the system frequency is derived
from an internal DCO, whereas in external clock mode, the system clock is derived from an externally
applied interface clock according to a defined dependency.
The Crypto2304T coprocessor allows calculation of asymmetric algorithms like RSA and Elliptic Curve (EC).
The Crypto2304T is optimized for security and low power consumption.
Note that the Crypto2304T can be blocked. The blocking depends on the user’s choice prior to the
production of the hardware. No accessibility of the Crypto2304T is without impact on any other security
policy of the TOE; it is exactly equivalent to the situation where the user simply decides not to use the
Crypto2304T
The Symmetric Cryptographic Processor (SCP) allows calculation of dual-key or triple-key triple-DES and
AES. The SCP is optimised for security and low power consumption. The SCP module computes the
complete DES algorithm within a few clock cycles and is designed to counter attacks like DPA, EMA and
DFA.
The STS (self-test software), RMS (Resource Management System), Service Algorithm Minimal (SAM) and
Flash Loader together compose the TOE firmware stored in the ROM. All mandatory functions for internal
testing, production usage and start-up behavior (STS), and also the RMS and SAM functions are grouped
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together in a common privilege level. These privilege levels are protected by a hardwired Memory
Management Unit (MMU) setting.
The user software has to be implemented in SOLID FLASH™ NVM. The user can choose, whether the
software is loaded into the SOLID FLASH™ NVM by Infineon Technologies AG or by the user
The TOE uses Special Function Registers (SFRs). These SFRs are used for general purposes and chip
configuration; they are located in SOLID FLASH™ NVM in a configuration area page.
The bus system comprises two separate bus entities: a memory bus and a peripheral bus for high-speed
communication with the peripherals.
An intelligent shielding algorithm finishes the upper layers above security critical signals and wires, finally
providing the so called “I
2
-shield”.
The following is a list of features provided by the TOE:
 24-bit linear addressing
 Up to 16 Mbytes of addressable memory
 Register-based architecture (registers can be accessed as bytes, words (2 bytes), and doublewords
(4 bytes))
 2-stage instruction pipeline
 Extensive set of powerful instructions, including 16- and 32-bit arithmetic and logic instructions
 Cache with single-cycle access searching
 16-bit ALU
2.2 Scope of the TOE
The TOE comprises three parts:
1. Hardware of the smartcard security controller
2. Associated firmware and software
3. Documents
The hardware configuration options and configuration methods are described in Section 1.1.
The second part of this TOE includes the associated firmware and software required for operation and
cryptographic support.
The documents as described in Section 2.2.4 and listed in Table 1, are supplied for user guidance. In the
following description, the term “manufacturer” stands for Infineon Technologies AG, the manufacturer of the
TOE. The Smartcard Embedded Software or user software is not part of the TOE.
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2.2.1 Hardware of the TOE
The hardware part of the TOE (see Figure 1) as defined in [1] comprises the following:
Core System
 Proprietary CPU implementation of the Intel
TM
MCS251 standard architecture from a
functional perspective
 Memory Encryption/Decryption Unit (MED)
 Memory Management Unit (MMU)
Memories
 Read-Only Memory (ROM): not available to the user
 Random Access Memory (RAM)
 SOLID FLASH™ NVM
Peripherals
 True Random Number Generator (TRNG)
 Pseudo Random Number Generator (PRNG)
 Watchdog and timers
 Universal Asynchronous Receiver/Transmitter (UART)
 Checksum module (CRC)
Control
 Dynamic Power Management
 Internal Clock Oscillator (ICO)
 Interrupt and Peripheral Event Channel Controller (ITP and PEC)
 Interface Management Module (IMM)
 User mode Security Life Control (UmSLC)
 Voltage regulator
Coprocessors
 Crypto2304T for asymmetric algorithms like RSA and EC (optionally blocked)
 Symmetric Crypto Coprocessor for AES and 3DES Standard
Security Peripherals
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 Filters
 Sensors
Buses
 Memory Bus
 Peripheral Bus
2.2.2 Firmware and Software of the TOE
The entire firmware of the TOE consists of different parts, as described below:
One part comprises the RMS and SAM routines for SOLID FLASH™ NVM programming, security functions
test, and random number online testing (Resource Management System, IC Dedicated Support Software in
[1]). The RMS and SAM routines are stored by Infineon Technologies AG in ROM.
The second part is the STS, consisting of test and initialization routines (Self Test Software, IC Dedicated
Test Software in [1]). The STS routines are stored in a specially protected test ROM and are not accessible
by user software.
The third part is the Flash Loader, a piece of software located in ROM and SOLID FLASH™ NVM. It
supports download of user software or parts of it to SOLID FLASH™ NVM. After completion of the download
the Flash Loader can be deactivated permanently by the user.
The optional software part of the TOE consists of the cryptographic libraries RSA and EC and the supporting
Toolbox and Base libraries.
The RSA library is used to provide a high-level interface to the RSA cryptography implemented on the
hardware component Crypto2304T and includes countermeasures against SPA, DPA and DFA attacks. The
routines are used for the generation of RSA Key Pairs (RsaKeyGen), the RSA signature verification
(RsaVerify), the RSA signature generation (RsaSign) and the RSA modulus recalculation (RsaModulus). The
module provides the basic long number calculations (add, subtract, multiply, square with 1100-bit numbers)
with high performance.
The RSA library is delivered as object code and is integrated in this way into the user software. The RSA
library can perform RSA operations from 512 to 4096 bits. Depending on the customer’s choice, the TOE can
be delivered with the 4096 code portion or with the 2048 code portion only. The 2048 code portion is
included in both.
Part of the evaluation are the RSA straight operations with key lengths from 1976 bits to 2048 bits, and the
RSA CRT2 operations with key lengths of 1976 bits to 4096 bits. Note that key lengths below 1976 bits are
not included in the certificate.
2 CRT Chinese Reminder Theorem
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The EC library is used to provide a high level interface to Elliptic Curve cryptography and includes
countermeasures against SPA, DPA and DFA attacks. The routines are used for ECDSA signature
generation, ECDSA signature verification, ECDSA key generation and Elliptic Curve Diffie-Hellman key
agreement. The EC library is delivered as object code and integrated in this way into the user software. The
certification covers the standard NIST [14] and Brainpool [15] Elliptic Curves with key lengths of 160, 163,
192, 224, 233, 256, 283, 320, 384, 409, 512 or 521 bits. Other types of elliptic curves can be added by the
user during a composite certification process.
The toolbox library provides long integer and modular arithmetic operations. It does not support any security
relevant policy or function.
The Base Library provides the low level interface to the asymmetric cryptographic coprocessor for the
cryptographic libraries and has no user available interface. It does not support any security relevant policy or
function.
2.2.3 Interfaces of the TOE
 The physical interface of the TOE to the external environment is the entire surface of the IC.
 The electrical interface of the TOE to the external environment includes the pads of the chip, particularly
the contacted RES, I/O, CLK lines and supply lines VCC and GND. The communication meets ISO
7816/ETSI/EMV standards.
 The data-oriented I/O interface of the TOE is represented by the I/O pad.
 The interface to the firmware consists of special registers used for hardware configuration and control
(Special Function Registers, SFR).
 The interface of the TOE to the operating system is covered by the RMS routines and by the instruction
set of the TOE.
 The interface of the TOE to the test routines is formed by the STS test routine call, i.e. entry to test mode
(STS-TM entry).
 The interface to the RSA calculations is defined by the RSA library
 The interface to the EC calculations is defined by the EC library
 The interface to the Toolbox basic arithmetic functions is defined by the Toolbox library.
Note that the interfaces of cryptographic libraries (RSA and EC) and the toolbox library are optional, as these
depend on the procurement order.
2.2.4 Guidance Documentation
The guidance documentation consists of:
 SLx 70 Family Hardware Reference Manual
 SLx 70 Family Production and Personalization User's Manual
 SLE 70 Family Programmer’s Reference User’s Manual
 M7790 M7791 M7793 M7794 Errata Sheet
These documents contain the description of all interfaces of the software to the hardware relevant for
programming the TOE.
 SLx 77CFXxxxP (M7793) Security Guidelines User's manual: This document provides secure coding
guidance to the application writer.
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 SLE77 Asymmetric Crypto Library for Crypto@2304T RSA/ECC/Toolbox User Interface (optional):
User Interface, contains all interfaces of the cryptographic RSA- and EC libraries, as well as of the
Toolbox library. This document is only delivered to the user in case the RSA library and/or the EC
library and/or the Toolbox library is/are part of the delivered TOE.
 Crypto@2304T User Manual, describing the architecture of cryptographic coprocessor on register
level. It also provides a functional description of the register architecture, instruction set and gives
programming guidance.
Finally the certification report may contain an overview of recommendations to a software developer
regarding the secure use of the TOE.
2.2.5 Forms of Delivery
The TOE can be delivered in the form of complete modules, as plain wafers in an IC case (e.g. DSO20) or in
bare dies. The delivery can therefore be at the end of phase 3 or at the end of phase 4 which may also
include pre-personalization steps according to [1]. In any case the testing of the TOE is finished and the
extended test features are removed. From a security policy point of view the different forms of delivery do not
have any impact.
The delivery to the software developer (phase 2  phase 1) contains the development package, which is
delivered in electronic form. It contains the documents as described above, the development and debugging
tools.
Part of the software delivery is the Flash Loader program, provided by Infineon Technologies AG, running on
the TOE and controlling the download of user software onto the TOE via the UART interface. The download
is only possible after successful authentication. The user software can also be downloaded in an encrypted
way. In addition, the user can permanently block further use of the Flash Loader.
2.2.6 Production sites
The TOE may be handled at different production sites but the silicon is produced in Dresden or TSMC only.
To distinguish the different production sites of various products in the field, the site is coded in the Chip Ident
Mode data. The exact coding of the relevant chip identification data is described in [7].
The delivery measures are described in the ALC_DVS aspect.
2.2.7 TOE Configuration
This TOE is represented by various configurations called products.
All are derived from the same configurable hardware M7793. The same mask is used to produce different
products of the TOE. The degree of freedom for configuring the TOE is predefined by Infineon Technologies
AG.
Table 2 shows the TOE hardware configurations such as the maximum configurable memory sizes and
availability of cryptographic coprocessors.
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Table 2: TOE hardware configuration options
Crypto system
2304T frequency
typical /
maximum
Accessible /
Blocked
1 to 6 Kbyte
SOLID FLASH™
memory RAM
0 to 240 Kbyte
Following configuration options are also available to customers:
 memory sizes of SOLID FLASH™ NVM and RAM,
 the availability of the cryptographic coprocessor Crypto2304T
 the availability and free combinations of the cryptographic libraries
RMS functions allow a customer to extract the present hardware configuration.
Two methods are available to customers to configure the TOE:
1. To order a configuration, which is defined and offered by Infineon Technologies.
2. To apply the Bill-Per-Use (BPU) method for the TOE. This method enables a customer to use
tailored products of the TOE within the TOE´s configuration options
BPU allows a customer to block chips on demand at the customer´s premises. Customers, who intend to use
this feature receive the TOEs in a predefined configuration, e.g. no blocking applies. The blocking
information is part of a chip configuration area. The blocking information can be modified by customers using
specific APDUs. Once final blocking is done, further modifications are disabled.
The BPU software part is only present on predefined products, which have been ordered with the BPU
option. In all other cases this software is not present on the product.
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2.2.8 TOE initialization with Customer Software
Several options are available to initialize the TOE with customer software:
Table 3: Options to initialize the TOE with customer software
1.
The user or/and a subcontractor downloads the
software into the SOLID FLASH™ NVM.
Infineon Technologies does not receive any user
software.
The Flash Loader can be activated or
reactivated by the user or subcontractor to
download software into the SOLID FLASH™
NVM.
2
The user provides software to download into the
SOLID FLASH™ NVM to Infineon Technologies
AG. The software is loaded into the SOLID
FLASH™ NVM during chip production.
There is no Flash Loader present.
3
The user provides software to download into the
SOLID FLASH™ NVM to Infineon Technologies
AG. The software is loaded into the SOLID
FLASH™ NVM during chip production.
The Flash Loader is blocked by Infineon but can
be activated or reactivated by the user or
subcontractor to download software into the
SOLID FLASH™ NVM. The user is required to
provide a reactivation procedure as part of the
software to Infineon Technologies AG.
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3 Conformance Claims (ASE_CCL)
3.1 CC Conformance Claim
This Security Target (ST) and the TOE claim conformance to Common Criteria version v3.1 part 1 [2], part 2
[3] and part 3 [4].
Conformance of this ST is claimed for:
Common Criteria part 2 extended and Common Criteria part 3 conformant.
3.2 PP Claim
This Security Target is in strict conformance to the
Security IC Platform Protection Profile [1].
The Security IC Platform Protection Profile is registered and certified by the Bundesamt für Sicherheit in der
Informationstechnik3 (BSI) under the reference BSI-PP-0035, Version 1.0, dated 15.06.2007.
The security assurance requirements of the TOE are according to the Security IC Platform Protection Profile
[1]. They are all drawn from Part 3 of the Common Criteria version v3.1.
The augmentations of [1] are listed below.
Table 4: Augmentations of the assurance level of the TOE
Assurance Class
Assurance
components Description
Life-cycle
support
ALC_DVS.2 Sufficiency of security measures
Vulnerability
assessment
AVA_VAN.5 Advanced methodical vulnerability analysis
3.3 Package Claim
This Security Target does not claim conformance to a package of [1].
The assurance level for the TOE is EAL5 augmented with the components ALC_DVS.2 and AVA_VAN.5.
3 Bundesamt für Sicherheit in der Informationstechnik (BSI) is the German Federal Authority for Information Security
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3.4 Conformance Rationale
This security target claims strict conformance to [1].
The Target of Evaluation (TOE) is a typical security IC as defined in [1] chapter 1.2.2 comprising:
 the circuitry of the IC (hardware including the physical memories),
 configuration data, initialisation data related to the IC Dedicated Software and the behaviour of the
security functionality
 the IC Dedicated Software with the parts
 the IC Dedicated Test Software,
 the IC Dedicated Support Software.
The TOE is designed, produced and/or generated by the TOE Manufacturer.
Security Problem Definition:
Following [1], the security problem definition is enhanced by adding a threat, an organization security policy
and an augmented assumption. Including these add-ons, the security problem definition of this security
target is consistent with the statement of the security problem definition in [1], as the security target claimed
strict conformance to [1].
Conformance Rationale:
The augmented organizational security policy P.Add-Functions, coming from the additional security
functionality of the cryptographic libraries, the augmented assumption A.Key-Function, related to the usage
of key-depending function, and the threat memory access violation T.Mem-Access, due to specific TOE
memory access control functionality, have been added. These add-ons have no impact on the conformance
statements regarding [2] and [1], with following rational:
 The security target remains conformant to [2], claim 482 as the possibility to introduce additional
restrictions is given.
 The security target fulfils the strict conformance claim of [1] due to the application notes 5, 6 and 7
which apply here. By those notes the addition of further security functions and security services are
covered, even without deriving particular security functionality from a threat but from a policy.
Due to additional security functionality, one coming from the cryptographic libraries - O.Add-Functions, and
due to the memory access control - O.Mem-Access, additional security objectives have been introduced.
These add-ons have no impact on the conformance statements regarding [2] and [1], with following rational:
 The security target remains conformant to [2], claim 482 as the possibility to introduce additional
restrictions is given.
 The security target fulfils the strict conformance of [1] due to the application note 9 applying here.
This note allows the definition of high-level security goals due to further functions or services
provided to the Security IC Embedded Software.
Therefore, the security objectives of this security target are consistent with the statement of the security
objectives in the PP [1], as the security target claimed strict conformance to [1].
All security functional requirements defined in [1] are included and completely defined in this ST. The
security functional requirements listed in the following are all taken from [3] and additionally included and
completely defined in this ST:
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 FDP_ACC.1 “Subset access control”
 FDP_ACF.1 “Security attribute based access control”
 FMT_MSA.1 “Management of security attributes”
 FMT_MSA.3 “Static attribute initialisation”
 FMT_SMF.1 “Specification of Management functions”
 FCS_COP.1 “Cryptographic support”
 FCS_CKM.1 “Cryptographic key generation”
 FDP_SDI.1 “Stored data integrity monitoring”
 FDP_SDI.2 “Stored data integrity monitoring and action”
The security functional requirement
 FPT_TST.2 “Subset TOE security testing“(Requirement from [3])
 FCS_RNG.1 “Random number generation”
are included and completely defined in this ST, section 6.
All assignments and selections of the security functional requirements are done in [1] and in this security
target in section 7.2.
The Assurance Requirements of the TOE obtain the Evaluation Assurance Level 5 augmented with the
assurance components ALC_DVS.2 and AVA_VAN.5 for the TOE.
3.5 Application Notes
The functional requirement FCS_RNG.1 is a refinement of the FCS_RNG.1 defined in [1] according to
“Anwendungshinweise und Interpretationen zum Schema (AIS)” [6].
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4 Security Problem Definition (ASE_SPD)
The content of [1] applies to this chapter completely.
4.1 Threats
The threats are directed against the assets and/or the security functions of the TOE. For example, certain
attacks are only one step towards a disclosure of assets while others may directly lead to a compromise of
the application security. The more detailed description of specific attacks is given later on in the process of
evaluation and certification. An overview on attacks is given in [1] section 3.2.
The threats to security are defined and described in [1] section 3.2.
Table 5: Threats according PP [1]
T.Phys-Manipulation Physical Manipulation
T.Phys-Probing Physical Probing
T.Malfunction Malfunction due to Environmental Stress
T.Leak-Inherent Inherent Information Leakage
T.Leak-Forced Forced Information Leakage
T.Abuse-Func Abuse of Functionality
T.RND Deficiency of Random Numbers
4.1.1 Additional Threat due to TOE specific Functionality
The additional functionality of introducing sophisticated privilege levels and access control allows the secure
separation between the operation system(s) and applications, the secure downloading of applications after
personalization and enables multitasking by separating memory areas and performing access controls
between different applications. Due to this additional functionality “area based memory access control” a new
threat is introduced.
The Smartcard Embedded Software is responsible for its User Data according to the assumption “Treatment
of User Data (A.Resp-Appl)”. However, the Smartcard Embedded Software may comprise different parts, for
instance an operating system and one or more applications. In this case, such parts may accidentally or
deliberately access data (including code) of other parts, which may result in a security violation.
The TOE shall avert the threat “Memory Access Violation (T.Mem-Access)” as specified below.
T.Mem-Access Memory Access Violation
Parts of the Smartcard Embedded Software may cause security violations by
accidentally or deliberately accessing restricted data (which may include
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code) or privilege levels. Any restrictions are defined by the security policy of
the specific application context and must be implemented by the Smartcard
Embedded Software.
Table 6: Additional threats due to TOE specific functions and augmentations
T.Mem-Access Memory Access Violation
For details see [1] section 3.2.
4.1.2 Assets regarding the Threats
The primary assets concern the User Data which includes the user data as well as program code (Security
IC Embedded Software) stored and in operation and the provided security services. These assets have to be
protected while being executed and or processed and on the other hand, when the TOE is not in operation.
This leads to four primary assets with its related security concerns:
 SC1 Integrity of User Data and of the Security IC Embedded Software (while being executed/processed
and while being stored in the TOE’s memories),
 SC2 Confidentiality of User Data and of the Security IC Embedded Software (while being processed and
while being stored in the TOE’s memories)
 SC3 Correct operation of the security services provided by the TOE for the Security IC Embedded
Software.
 SC4 Continuous availability of random numbers
SC4 is an additional security service provided by this TOE which is the availability of random numbers.
These random numbers are generated either by a true random number or a deterministic random number
generator or by both, when a true random number is used as seed for the deterministic random number
generator. Note that the generation of random numbers is a requirement of [1].
To be able to protect the listed assets the TOE shall protect its security functionality as well. 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 reticles.
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
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 reticles and products in any form
as long as they are generated, stored, or processed by the TOE Manufacturer.
For details see [1] section 3.1.
4.2 Organizational Security Policies
The TOE has to be protected during the first phases of their lifecycle (phases 2 up to TOE delivery which can
be after phase 3 or phase 4). Later on each variant of the TOE has to protect itself. The organisational
security policy covers this aspect.
P.Process-TOEProtection 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.
The organisational security policies are defined and described in [1] section 3.3. Due to the augmentations of
[1] an additional policy is introduced and described in the next chapter.
Table 7: Organizational Security Policies according [1]
P.Process-TOE Protection during TOE Development and Production
4.2.1 Augmented Organizational Security Policy
Due to the augmentations of [1] an additional policy is introduced.
The TOE provides specific security functionality, which can be used by the Smartcard Embedded Software.
In the following specific security functionality is 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 application, against which
threats the Smartcard Embedded Software will use the specific security functionality.
The IC Developer / Manufacturer must apply the policy “Additional Specific Security Functionality
(P.Add-Functions)” as specified below.
P.Add-Functions Additional Specific Security Functionality
The TOE shall provide the following specific security functionality to the
Smartcard Embedded Software:
 Advanced Encryption Standard (AES)
 Triple Data Encryption Standard (3DES)
 Rivest-Shamir-Adleman Cryptography (RSA),
 Elliptic Curve Cryptography (EC)
Note 1:
The cryptographic libraries RSA and EC and the Toolbox library are delivery options. . If one of the libraries
RSA, EC or Toolbox are delivered, the Base Lib is automatically part of it.Therefore the user may choose a
free combination of these libraries. In case of deselecting one or several of these libraries the TOE does not
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provide the respective functionality Additional Specific Security Functionality Rivest-Shamir-Adleman
Cryptography (RSA) and/or Elliptic Curve Cryptography (EC). The Toolbox and Base Library are no
cryptographic libraries and provide no additional specific security functionality.
End of note.
Note 2:
The Crypto2304T can be blocked. The blocking depends on the user’s choice prior to the production of the
hardware. No accessibility of the Crypto2304T is without 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 Crypto2304T
End of note.
4.3 Assumptions
The TOE assumptions on the operational environment are defined and described in [1] section 3.4.
The assumptions concern the phases where the TOE has left the chip manufacturer.
A.Process-Sec-IC Protection during Packaging, Finishing and Personalization
It is assumed that security procedures are used after delivery of the TOE by
the TOE Manufacturer up to delivery to the end-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).
A.Plat-Appl Usage of Hardware Platform
The Security IC Embedded Software is designed so that the requirements
from the following documents are met: (i) TOE guidance documents (refer to
the Common Criteria assurance class AGD) such as the hardware data
sheet, and the hardware application notes, and (ii) findings of the TOE
evaluation reports relevant for the Security IC Embedded Software as
documented in the certification report.
A.Resp-Appl Treatment of User Data
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.
The support of cipher schemas needs to make an additional assumption.
Table 8: Assumption according PP [1]
A.Process-Sec-IC Protection during Packaging, Finishing and Personalization
A.Plat-Appl Usage of Hardware Platform
A.Resp-Appl Treatment of User Data
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4.3.1 Augmented Assumptions
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).
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
For details see [1] section 3.4.
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5 Security objectives (ASE_OBJ)
This section shows the subjects and objects, which are relevant to the TOE.
A short overview is given in the following.
The user has the following standard high-level security goals related to the assets:
 SG1 maintain the integrity of User Data and of the Security IC Embedded Software
 SG2 maintain the confidentiality of User Data and of the Security IC Embedded Software
 SG3 maintain the correct operation of the security services provided by the TOE for the Security IC
Embedded Software
 SG4 provision of random numbers.
5.1 Security objectives of the TOE
The security objectives of the TOE are defined and described in PP [1] section 4.1.
Table 9: Objectives for the TOE according to PP [1]
O.Phys-Manipulation Protection against Physical Manipulation
O.Phys-Probing Protection against Physical Probing
O.Malfunction Protection against Malfunction
O.Leak-Inherent Protection against Inherent Information Leakage
O.Leak-Forced Protection against Forced Information Leakage
O.Abuse-Func Protection against Abuse of Functionality
O.Identification TOE Identification
O.RND Random Numbers
The TOE provides “Additional Specific Security Functionality (O.Add-Functions)” as specified below.
O.Add-Functions Additional Specific Security Functionality
The TOE must provide the following specific security functionality to the
Smartcard Embedded Software:
 Advanced Encryption Standard (AES)
 Triple Data Encryption Standard (3DES),
 Rivest-Shamir-Adleman (RSA)
 Elliptic Curve Cryptography (EC)
Note 3:
The cryptographic libraries RSA and EC and the Toolbox library are delivery options. If one of the libraries
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RSA, EC or Toolbox is delivered, the Base Lib is automatically part of it.Therefore the user may choose a
free combination of these libraries. In case of deselecting one or several of these libraries the TOE does not
provide the respective functionality Additional Specific Security Functionality Rivest-Shamir-Adleman
Cryptography (RSA) and/or Elliptic Curve Cryptography (EC). The Toolbox and Base Library are no
cryptographic libraries and provide no additional specific security functionality.
End of note.
Note 4:
The Crypto2304T can be blocked. The blocking depends on the user’s choice prior to the production of the
hardware. No accessibility of the Crypto2304T is without 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 Crypto2304T
End of note.
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 and privilege levels is controlled as required, for example, in a
multi-application environment.
Table 10: Additional objectives due to TOE specific functions and augmentations
O.Add-Functions Additional specific security functionality
O.Mem-Access Area based Memory Access Control
5.2 Security Objectives for the development and operational Environment
The security objectives for the security IC embedded software development environment and the operational
environment is defined in [1] section 4.2 and 4.3. The table below lists the security objectives.
Table 11: Security objectives for the environment according to [1]
Phase 1 OE.Plat-Appl
OE.Resp-Appl
Usage of Hardware Platform
Treatment of User Data
Phase 5 – 6 optional
Phase 4
OE.Process-Sec-IC Protection during composite product
manufacturing
5.2.1 Clarification of “Usage of Hardware Platform (OE.Plat-Appl)”
Regarding the cryptographic services this objective of the environment has to be clarified. The TOE supports
cipher schemes as additional specific security functionality. If required the Smartcard Embedded Software
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shall use these cryptographic services of the TOE and their interface as specified. When key-dependent
functions implemented in the Smartcard Embedded Software are just being executed, the Smartcard
Embedded Software must provide protection against disclosure of confidential data (User Data) stored
and/or processed in the TOE by using the methods described under “Inherent Information Leakage (T.Leak-
Inherent)” and “Forced Information Leakage (T.Leak-Forced)“.
The objectives of the environment regarding the memory, software and firmware protection and the SFR and
peripheral-access-rights-handling have to be clarified. For the separation of different applications the
Smartcard Embedded Software (Operating System) may implement a memory management scheme based
upon security functions of the TOE.
5.2.2 Clarification of “Treatment of User Data (OE.Resp-Appl)”
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.
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. For example, it must be ensured that it is
beyond practicality to derive the private key from a public key if asymmetric algorithms are used. 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.
Regarding the memory, software and firmware protection and the SFR and peripheral access rights handling
these objectives 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.
5.2.3 Clarification of “Protection during Composite product manufacturing
(OE.Process-Sec-IC)”
The protection during packaging, finishing and personalization includes also the personalization process
(Flash Loader software) and the personalization data (TOE software components) during Phase 4, Phase 5
and Phase 6.
5.3 Security Objectives Rationale
The security objectives rationale of the TOE are defined and described in PP [1] section 4.4. For
organizational security policy P.Add-Functions, OE.Plat-Appl and OE.Resp-Appl the rationale is given in the
following description.
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Table 12: Security Objective Rational
Assumption, Threat or Organisational
Security Policy Security Objective
P.Add-Functions O.Add-Functions
A.Key-Function OE.Plat-Appl
OE.Resp-Appl
T.Mem-Access O.Mem-Access
The justification related to the security objective “Additional Specific Security Functionality
(O.Add-Functions)” is as follows: Since O.Add-Functions requires the TOE to implement exactly the same
specific security functionality as required by P.Add-Functions; the organisational security policy is covered by
the objective.
Nevertheless the security objectives O.Leak-Inherent, O.Phys-Probing, O.Malfunction, O.Phys-Manipulation
and O.Leak-Forced define how to implement the specific security functionality required by P.Add-Functions.
(Note that these objectives support that the specific security functionality is provided in a secure way as
expected from P.Add-Functions.) Especially O.Leak-Inherent and O.Leak-Forced refer to the protection of
confidential data (User Data or TSF data) in general. User Data are also processed by the specific security
functionality required by P.Add-Functions.
Compared to [1] clarification has been made for the security objective “Usage of Hardware Platform
(OE.Plat-Appl)”: If required the Smartcard Embedded Software shall use these cryptographic services of the
TOE and their interface as specified. In addition, the Smartcard Embedded Software must implement
functions which perform operations on keys (if any) in such a manner that they do not disclose information
about confidential data. The non disclosure due to leakage A.Key-Function attacks is included in this
objective OE.Plat-Appl. This addition ensures that the assumption A.Plat-Appl is still covered by the objective
OE.Plat-Appl although additional functions are being supported according to O.Add-Functions.
Compared to [1] 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 although additional functions are being supported according to P.Add-Functions.
Compared to [1] an enhancement regarding memory area protection has been established. The clear
definition of privilege levels for operated software establishes the clear separation of different restricted
memory areas for running the firmware, downloading and/or running the operating system and to establish a
clear separation between different applications. Nevertheless, it is also possible to define a shared memory
section where separated applications may exchange defined data. The privilege levels clearly define by
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using a hierarchical model the access right from one level to the other. These measures ensure that the
threat T.Mem-Access is clearly covered by the security objective O.Mem-Access.
The objective O.RND corresponds directly to the description of the threat T.RND. Therefore T.RND is
covered by O.RND.
The justification of the additional policy and the additional assumption show that they do not contradict to the
rationale already given in the Protection Profile for the assumptions, policy and threats defined there.
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6 Extended Component Definition (ASE_ECD)
There are four extended components defined and described for the TOE:
 the family FCS_RNG at the class FCS Cryptographic Support
 the family FMT_LIM at the class FMT Security Management
 the family FAU_SAS at the class FAU Security Audit
 the component FPT_TST.2 at the class FPT Protection of the TSF
The extended components FMT_LIM and FAU_SAS are defined and described in PP [1] section 5. The
component FPT_TST.2 and FCS_RNG are defined in the following sections.
6.1 Component “Subset TOE security testing (FPT_TST)”
The security is strongly dependent on the correct operation of the security functions. Therefore, the TOE
shall support that particular security functions or mechanisms are tested in the operational phase (Phase 7).
The tests can be initiated by the Smartcard Embedded Software and/or by the TOE or is done automatically
and continuously.
Part 2 of the Common Criteria provides the security functional component “TSF testing (FPT_TST.1)”. The
component FPT_TST.1 provides the ability to test the TSF’s correct operation.
For the user it is important to know which security functions or mechanisms can be tested. The functional
component FPT_TST.1 does not mandate to explicitly specify the security functions being tested. In addition,
FPT_TST.1 requires verification of the integrity of TSF data and of the stored TSF executable code which
might violate the security policy. Therefore, the functional component ”Subset TOE security testing
(FPT_TST.2)” of the family TSF self test has been newly created. This component allows that particular
parts of the security mechanisms and functions provided by the TOE are tested.
6.2 Definition of FPT_TST.2
The functional component “Subset TOE security testing (FPT_TST.2)” has been newly created (Common
Criteria Part 2 extended). This component allows that particular parts of the security mechanisms and
functions provided by the TOE can be tested after TOE Delivery or are tested automatically and continuously
during normal operation transparent for the user. This security functional component is used instead of the
functional component FPT_TST.1 from Common Criteria Part 2. For the user it is important to know which
security functions or mechanisms can be tested. The functional component FPT_TST.1 does not mandate to
explicitly specify the security functions being tested. In addition, FPT_TST.1 requires verifying the integrity of
TSF data and stored TSF executable code which might violate the security policy.
The functional component “Subset TOE testing (FPT_TST.2)” is specified as follows (Common Criteria Part
2 extended).
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6.3 TSF self test (FPT_TST)
Family Behavior The Family Behavior is defined in [3] section 15.14 (442,443).
Component levelling
FPT_TST TSF self test
1
2
FPT_TST.1: The component FPT_TST.1 is defined in [3] section 15.14 (444, 445,446).
FPT_TST.2: Subset TOE security testing, provides the ability to test the correct operation of particular
security functions or mechanisms. These tests may be performed at start-up, periodically, at
the request of the authorized user, or when other conditions are met. It also provides the
ability to verify the integrity of TSF data and executable code.
Management: FPT_TST.2
The following actions could be considered for the management functions in FMT:
 management of the conditions under which subset TSF self testing occurs, such as during initial
start-up, regular interval or under specified conditions
 management of the time of the interval appropriate.
Audit: FPT_TST.2
There are no auditable events foreseen.
FPT_TST.2 Subset TOE testing
Hierarchical to: No other components.
Dependencies: No dependencies
FPT_TST.2.1: The TSF shall run a suite of self tests [selection: during initial start-up, periodically during
normal operation, at the request of the authorized user, and/or at the conditions [assignment:
conditions under which self test should occur]] to demonstrate the correct operation of
[assignment: functions and/or mechanisms].
6.4 Family “Generation of Random Numbers (FCS_RNG)”
The component “Random number generation (FCS_RNG.1)” has to be newly created according the new
version of the “Anwendungshinweise und Interpretationen zum Schema (AIS)” [6]. This security functional
component is used instead of the functional component FCS_RNG.1 defined in [1].
The family “Generation of random numbers (FCS_RNG)” is specified as follows (Common Criteria Part 2
extended).
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6.5 Definition of FCS_RNG.1
This section describes the functional requirements for the generation of random numbers, which
may be used as secrets for cryptographic purposes or authentication. The IT security functional requirements
for the TOE are defined in an additional family (FCS_RNG) of the Class FCS (Cryptographic support).
FCS_RNG Generation of random numbers
Family Behaviour
This family defines quality requirements for the generation of random numbers that are intended
to be used for cryptographic purposes.
Component levelling:
FCS_RNG: Generation of random numbers
TSF self test
1
FCS_RNG.1: Generation of random numbers, requires that the random number generator
implements defined security capabilities and that the 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 physical, hybrid deterministic] random number generator that imple-
ments: [assignment: list of security capabilities].
FCS_RNG.1.2: The TSF shall provide random numbers that meet [assignment: a defined
quality metric].
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Application Note 1: The functional requirement FCS_RNG.1 is a refinement of the FCS_RNG.1
defined in the Protection Profile [1] according to “Anwendungshinweise und
Interpretationen zum Schema (AIS)” [6].
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7 Security Requirements (ASE_REQ)
For this section [1] section 6 can be applied completely.
7.1 TOE Security Functional Requirements
The security functional requirements (SFR) for the TOE are defined and described in [1] section 6.1 and in
the following description.
Table 13 provides an overview of the functional security requirements of the TOE, defined in [1] section 6.1.
The last column shows, whether the requirement is refined. The refinements are also valid for this ST.
Table 13: Security functional requirements defined in [1]
Security Functional Requirement Refined in [1]
FRU_FLT.2 “Limited fault tolerance“ Yes
FPT_FLS.1 “Failure with preservation of secure state” Yes
FMT_LIM.1 “Limited capabilities” No
FMT_LIM.2 “Limited availability” No
FAU_SAS.1 “Audit storage” No
FPT_PHP.3 “Resistance to physical attack” Yes
FDP_ITT.1 “Basic internal transfer protection” Yes
FPT_ITT.1 “Basic internal TSF data transfer protection Yes
FDP_IFC.1 “Subset information flow control” No
Table 14 provides an overview about the augmented security functional requirements, which are added to
the TOE and defined in this ST. All requirements are taken from [3] Part 2, with the exception of requirement
FPT_TST.2 and FCS_RNG, which are defined in this ST completely.
Table 14: Augmented security functional requirements
Security Functional Requirement
FPT_TST.2 “Subset TOE security testing“
FDP_ACC.1 “Subset access control”
FDP_ACF.1 “Security attribute based access control”
FMT_MSA.1 “Management of security attributes”
FMT_MSA.3 “Static attribute initialisation”
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Security Functional Requirement
FMT_SMF.1 “Specification of Management functions”
FCS_COP.1 “Cryptographic support”
FCS_CKM.1 “Cryptographic key management”
FDP_SDI.1 “Stored data integrity monitoring
FDP_SDI.2 “Stored data integrity monitoring and action”
FCS_RNG.1 “Random number generation”
All assignments and selections of the security functional requirements of the TOE are done in [1] and in the
following description.
The above marked extended components FMT_LIM.1 and FMT_LIM.2 are introduced in [1] to define the IT
security functional requirements of the TOE as an additional family (FMT_LIM) of the Class FMT (Security
Management). 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 additional component FAU_SAS is introduced to define the security functional requirements of the TOE
of the Class FAU (Security Audit). This family describes the functional requirements for the storage of audit
data and is described in the next chapter.
The requirement FPT_TST.2 is the subset of TOE testing and originated in [3]. This requirement is given as
the correct operation of the security functions is essential. The TOE provides mechanisms to cover this
requirement by the smartcard embedded software and/or by the TOE itself.
7.1.1 Extended Components FCS_RNG.1 and FAU_SAS.1
7.1.1.1 FCS_RNG
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.1 Random Number Generation
Hierarchical to: No other components
Dependencies: No dependencies
FCS_RNG.1 Random numbers generation Class PTG.2 according to [6]
FCS_RNG.1.1 The TSF shall provide a physical random number generator that implements:
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PTG.2.1 A total failure test detects a total failure of entropy source immedia-
tely 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 num-
ber that depends on some raw random numbers that have been gen-
erated 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 num-
ber sequence. It is triggered continuously. The online test is suitable
for detecting non-tolerable statistical defects of the statistical proper-
ties of the raw random numbers within an acceptable period of time.
FCS_RNG.1.2 The TSF shall provide numbers in the format 8- or 16-bit that meet
PTG.2.6 Test procedure A, as defined in [6] 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 2: The functional requirement FCS_RNG.1 is a refinement of the FCS_RNG.1
defined in the Protection Profile [1] according to “Anwendungshinweise und
Interpretationen zum Schema (AIS)” [6].
7.1.1.2 FAU_SAS
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.
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 dependencies
Dependencies: No dependencies.
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FAU_SAS.1.1 The TSF shall provide the test process before TOE Delivery with the
capability to store the Initialization Data and/or Pre-personalization Data
and/or supplements of the Security IC Embedded Software in the not
changeable configuration page area and non-volatile memory.
Note, that the TOE can be clearly identified by the Chip Identification Mode (CIM) and dedicated RMS
functions. The CIM outputs the chip identification, design step and firmware versions. Dedicated RMS
functions allow a customer to extract the present hardware configuration and the original Chip Identifier Byte,
which was valid before blocking.
7.1.2 Subset of TOE testing
The security is strongly dependent on the correct operation of the security functions. Therefore, the TOE
shall support that particular security functions or mechanisms are tested in the operational phase (Phase 7).
The tests can be initiated by the Smartcard Embedded Software and/or by the TOE.
The TOE shall meet the requirement “Subset TOE testing (FPT_TST.2)” as specified below (Common
Criteria Part 2 extended).
FPT_TST.2 Subset TOE testing
Hierarchical to: No other components.
Dependencies: No dependencies
FPT_TST.2.1 The TSF shall run a suite of self tests at the request of the authorised user to
demonstrate the correct operation of the alarm lines and/or following
environmental sensor mechanisms:
 CORE – CPU related alarms
 SCP - Symmetric Cryptographic Co-Processor
 Temperature alarm
 Memory Bus
 NVM_MISS – SOLID FLASH™ NVM illegal addressing alarm
 FSE – Internal Frequency Sensor alarm
 Light – Light sensitive alarm
 WDT - Watch Dog Timer related alarms
 SW – Software triggered alarm
 TRNG – True Random Number Generator
 Glitch sensor alarm
 Backside light detection (BLD) - alarm
 RAM/ROM EDC or SOLID FLASH™ NVM ECC
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7.1.3 Memory access control
Usage of multiple applications in one Smartcard often requires code and data separation in order to prevent
one application from accessing code and/or data of another application. For this reason the TOE provides
Area based Memory Access Control. The underlying memory management unit (MMU) is documented in
section 4 of [7].
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 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 Smartcard Embedded 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.
The security functional requirement “Static attribute initialisation (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).
From TOE’s point of view the different roles in the Smartcard Embedded Software can be distinguished
according to the memory based access control. However the definition of the roles belongs to the user
software.
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 the privilege levels as defined below. Any access is controlled,
regardless whether the access is on code or data or a jump on any other
privilege level outside the current one.
The memory model provides distinct, independent privilege levels separated
from each other in the virtual address space. These levels are referred to as
the Infineon Technologies (IFX) level, operating system 1 and 2 levels (OS1,
OS2), shared application level, and application 1 and 2 levels. A pseudo-
level is the “current” level, which is simply the level on which code is
currently being executed. The access rights are controlled by the MMU and
related to the privilege level as depicted in following diagram:
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Figure 2: Privilege Levels of the TOE
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.
Dependencies: FDP_ACF.1 Security attribute based access control
FDP_ACC.1.1 The TSF shall enforce the Memory Access Control Policy on all subjects
(software running at the defined and assigned privilege levels), all objects
(data including code stored in memories) and all the operations defined in
the Memory Access Control Policy, i.e. privilege levels.
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
Hierarchical to: No other components.
Dependencies: FDP_ACC.1 Subset access control
FMT_MSA.3 Static attribute initialisation
FDP_ACF.1.1 The TSF shall enforce the Memory Access Control Policy to objects based
on the following:
Subject:
- software running at the IFX, OS1 and OS2 privilege levels required to
securely operate the chip. This includes also privilege levels running
interrupt routines.
- software running at the privilege levels containing the application
software
Object:
- data including code stored in memories
Attributes:
- the memory area where the access is performed to and/or
- the operation to be performed.
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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 of the relevant
memory range before, during or after the access so that accesses to be
denied can not be utilised by the subject attempting to perform the operation.
FDP_ACF.1.3 The TSF shall explicitly authorize 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.
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.
Dependencies: FMT_MSA.1 Management of security attributes
FMT_SMR.1 Security roles
FMT_MSA.3.1 The TSF shall enforce the Memory Access Control Policy to provide well
defined4 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 allowed5, to specify
alternative initial values to override the default values when an object or
information is created.
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.
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
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 information to the software running on the privilege levels.
The TOE shall meet the requirement “Specification of management functions (FMT_SMF.1)” as specified
below:
4 The static definition of the access rules is documented in [7]
5 The Smartcard Embedded Software is intended to set the memory access control policy
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FMT_SMF.1 Specification of management functions
Hierarchical to: No other components
Dependencies: No dependencies
FMT_SMF.1.1 The TSF shall be capable of performing the following security management
functions: access the configuration registers of the MMU.
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7.1.4 Support of Cipher Schemes
The following additional specific security functionality is implemented in the TOE:
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; dependencies are discussed in Section
7.3.1.1.
The following additional specific security functionality is implemented in the TOE:
 Advanced Encryption Standard (AES)
 Triple Data Encryption Standard (3DES)
 Elliptic Curve Cryptography (EC)
 Rivest-Shamir-Adleman (RSA)6
Preface regarding Security Level related to Cryptography
The strength of the cryptographic algorithms was not rated in the course of the product certification (see [24]
Section 9, Para.4, Clause 2). But Cryptographic Functionalities with a security level of lower than
100 bits can no longer be regarded as secure without considering the application context.
Therefore for these functionalities it shall be checked whether the related crypto operations are
appropriate for the intended system. Some further hints and guidelines can be derived from
the 'Technische Richtlinie BSI TR-02102', www.bsi.bund.de.
Any Cryptographic Functionality that is marked in column 'Security Level above 100 Bits' of the
following table with 'no' achieves a security level of lower than 100 Bits (in general context).
Table 15: TOE cryptographic functionality
Purpose Cryptographic
Mechanism
Standard of
Implementati
on
Key Size in Bits Security Level above
100 Bits
Key
Agreement
ECDH [23] Key sizes corresponding to
the used elliptic curves P-
192, K-163 [14] and
brainpoolP{160, 192}r1,
brainpoolP{160, 192}t1 [15]
No
6 In case a user deselects the RSA and/or EC library, the TOE provides basic HW-related routines for RSA and/or EC
calculations. For a secure library implementation the user has to implement additional countermeasures.
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ECDH [23] Key sizes corresponding to
the used elliptic curves P-
{224, 256, 384, 521}, K-{233,
409}, B-{233, 283, 409} [14],
brainpoolP{224,256,320,384,
512}r1,
brainpoolP{224,256,320,384,
512}t1 [15]
Yes
Cryptographi
c Primitive
TDES [19] |k| = 112 No
TDES [19] |k| = 168 Yes
AES [20] |k| = 128, 192, 256 Yes
RSA encryption /
decryption / signature
generation / verification
(only modular
exponentiation part)
[21] Modulus length =
1976 - 4096
Yes
ECDSA signature
generation / verification
[22] Key sizes corresponding to
the used elliptic curves P-
192, K-163 [14] and
brainpoolP{160, 192}r1,
brainpoolP{160, 192}t1 [15]
No
ECDSA signature
generation / verification
[22] Key sizes corresponding to
the used elliptic curves P-
{224, 256, 384, 521}, K-{233,
409}, B-{233, 283, 409} [14],
brainpoolP{224,256,320,384,
512}r1,
brainpoolP{224,256,320,384,
512}t1 [15])
Yes
Physical True RNG
PTG.2
[6] N/A N/A
Triple-DES Operation
The 3DES Operation of the TOE shall meet the requirement “Cryptographic operation (FCS_COP.1)” as
specified below.
FCS_COP.1/3DES Cryptographic operation
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Hierarchical to: No other components.
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 management]
FCS_CKM.4 Cryptographic key destruction
FCS_COP.1.1/3DES The TSF shall perform encryption and decryption in accordance to a
specified cryptographic algorithm Triple Data Encryption Standard (3DES)
with cryptographic key sizes of 2 x 56 bit or 3 x 56 bit, that meet the following
standards
National Institute of Standards and Technology (NIST), Technology
Administration, U.S. Department of Data Encryption Standard (DES), NIST
Special Publication 800-67, Version 1.1
AES Operation
The AES Operation of the TOE shall meet the requirement “Cryptographic operation (FCS_COP.1)” as
specified below.
FCS_COP.1/AES Cryptographic operation
Hierarchical to: No other components.
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
FCS_COP.1.1/AES The TSF shall perform encryption and decryption in accordance to a
specified cryptographic algorithm Advanced Encryption Standard (AES) and
cryptographic key sizes of 128 bit or 192 bit or 256 bit that meet the following
standards:
U.S. Department of Commerce, National Institute of Standards and
Technology, Information Technology Laboratory (ITL),
Advanced Encryption Standard (AES), FIPS PUB 197
Rivest-Shamir-Adleman (RSA) operation
The Modular Arithmetic Operation 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.
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
FCS_COP.1.1/RSA The TSF shall perform encryption and decryption in accordance with a
specified cryptographic algorithm Rivest-Shamir-Adleman (RSA) and
cryptographic key sizes 1976 - 4096 bits that meet the following standards
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Encryption:
According to section 5.1.1 RSAEP in PKCS v2.1 RFC3447,
without 5.1.1.1.
Decryption (with or without CRT):
According to section 5.1.2 RSADP in PKCS v2.1 RFC3447
for u = 2, i.e., without any (r_i, d_i, t_i), i >2,
therefore without 5.1.2.2.b (ii)&(v), without 5.1.2.1.
5.1.2.2.a, only supported up to n < 2
2048
Signature Generation (with or without CRT)::
According to section 5.2.1 RSASP1 in PKCS v2.1 RFC3447
for u = 2, i.e., without any (r_i, d_i, t_i), i >2,
therefore without 5.2.1.2.b (ii)&(v), without 5.2.1.1.
5.2.1.2.a, only supported up to n < 2
2048
Signature Verification:
According to section 5.2.2 RSAVP1 in PKCS v2.1 RFC3447,
without 5.2.2.1.
Rivest-Shamir-Adleman (RSA) key generation
The key generation for the RSA shall meet the requirement “Cryptographic key generation (FCS_CKM.1)”
FCS_CKM.1/RSA Cryptographic key generation
Hierarchical to: No other components.
Dependencies: FCS_CKM.2 Cryptographic key distribution, or
FCS_COP.1 Cryptographic operation]
FCS_CKM.4 Cryptographic key destruction
FMT_MSA.2 Secure security attributes
FCS_CKM.1.1/RSA The TSF shall generate cryptographic keys in accordance with a specified
cryptographic key generation algorithm rsagen1 (PKCS v2.1 RFC3447) and
specified cryptographic key sizes of 1976 – 4096 bits that meet the following
standard:
According to section 3.2(2) in PKCS v2.1 RFC3447,
for u=2, i.e., without any (r_i, d_i, t_i), i > 2.
For p x q < 2
2048
additionally according to section 3.2(1).
Note 5:
For easy integration of RSA functions into the user’s operating system and/or application, the library contains
single cryptographic functions respectively primitives which are compliant to the standard. The primitives are
referenced above. Therefore, the library supports the user to develop an application representing the
standard if required.
End of note.
Note 6:
The TOE can be delivered with or without the RSA library. In case a user deselects the library the TOE does
not provide the Additional Specific Security Functionality Rivest-Shamir-Adleman Cryptography (RSA)
realized with the security functional requirements FCS_COP.1/RSA and FCS_CKM.1/RSA. In case of a
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blocked Crypto2304T no cryptographic libraries are delivered.
End of note.
Elliptic Curve DSA (ECDSA) operation
The Modular Arithmetic Operation 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.
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
FCS_COP.1.1/ECDSA
The TSF shall perform signature generation and signature verification in
accordance with a specified cryptographic algorithm ECDSA and
cryptographic key sizes 160, 163, 192, 224, 233, 256, 283, 320, 384, 409,
512 or 521 bits that meet the following standard:
Signature Generation:
1. According to section 7.3 in ANSI X9.62 - 2005
Not implemented is step d) and e) thereof.
The output of step e) has to be provided as input to our function by
the caller.
Deviation of step c) and f):
The jumps to step a) were substituted by a return of
the function with an error code, the jumps are emulated by another
call to our function.
2. According to sections 6.2 (6.2.2. + 6.2.3) in ISO/IEC 15946-2:2002
Not implemented is section 6.2.1:
The output of 5.4.2 has to be provided by the caller as input to the
function.
Signature Verification:
1. According to section 7.4.1 in ANSI X9.62–2005
Not implemented is step b) and c) thereof.
The output of step c) has to be provided as input to our function by
the caller.
Deviation of step d):
Beside noted calculation, our algorithm adds a random multiple of
BasepointerOrder n to the calculated values u1 and u2.
2. According to sections 6.4 (6.4.1. + 6.4.3 + 6.4.4) in ISO/IEC
15946-2:2002
Not implemented is section 6.4.2:
The output of 5.4.2 has to be provided by the caller as input to the
function.
Note 7:
For easy integration of EC functions into the user’s operating system and/or application, the library contains
single cryptographic functions respectively primitives which are compliant to the standard. The primitives are
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referenced above. Therefore, the library supports the user to develop an application representing the
standard if required.
End of note.
Elliptic Curve (EC) key generation
The key generation for the EC shall meet the requirement “Cryptographic key generation (FCS_CKM.1)”
FCS_CKM.1/EC Cryptographic key generation
Hierarchical to: No other components.
Dependencies: FCS_CKM.2 Cryptographic key distribution, or
FCS_COP.1 Cryptographic operation]
FCS_CKM.4 Cryptographic key destruction
FMT_MSA.2 Secure security attributes
FCS_CKM.1.1/EC The TSF shall generate cryptographic keys in accordance with a specified
cryptographic key generation algorithm Elliptic Curve EC specified in ANSI
X9.62-2005 and ISO/IEC 15946-1:2002 and specified cryptographic key
sizes 160, 163, 192, 224, 233, 256, 283, 320, 384, 409, 512 or 521 bits that
meet the following standard:
ECDSA Key Generation:
1. According to the appendix A4.3 in ANSI X9.62-2005
Optional cofactor h is not supported.
2. According to section 6.1 (not 6.1.1) in ISO/IEC 15946-1:2002
Note 8:
For easy integration of EC functions into the user’s operating system and/or application, the library contains
single cryptographic functions respectively primitives which are compliant to the standard. The primitives are
referenced above. Therefore, the library supports the user to develop an application representing the
standard if required.
End of note.
Elliptic Curve Diffie-Hellman (ECDH) key agreement
The Modular Arithmetic Operation 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.
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
FCS_COP.1.1/ECDH
The TSF shall perform elliptic curve Diffie-Hellman key agreement in
accordance with a specified cryptographic algorithm ECDH and
cryptographic key sizes 160, 163, 192, 224, 233, 256, 283, 320, 384, 409,
512 or 521 bits that meet the following standard:
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1. According to section 5.4.1 in ANSI X9.63 -2001
Unlike section 5.4.1.3 our, implementation not only returns the
x-coordinate of the shared secret, but rather the x-coordinate and
y-coordinate.
2. According to sections 8.4.2.1, 8.4.2.2, 8.4.2.3, and 8.4.2.4 in
ISO/IEC 15946-3:2002:
The function enables the operations described in the four sections.
Note 9:
The certification covers the standard NIST [14] and Brainpool [15] Elliptic Curves with key lengths of 160,
163, 192, 224, 233, 256, 283, 320, 384, 409, 512 or 521 Bits. Other types of elliptic curves can be added by
the user during a composite certification process.
End of note.
Note 10:
For easy integration of EC functions into the user’s operating system and/or application, the library contains
single cryptographic functions respectively primitives which are compliant to the standard. The primitives are
referenced above. Therefore, the library supports the user to develop an application representing the
standard if required.
End of note.
Note 11:
The TOE can be delivered without the EC library. In case a user deselects the library the TOE does not
provide the Additional Specific Security Functionality Elliptic Curve Cryptography realised with the security
functional requirements FCS_COP.1/ECSA, FCS_COP.1/ECDH and FCS_CKM.1/EC. In case of a blocked
Crypto2304T no cryptographic libraries are delivered.
End of note.
Note 12:
The EC primitives allow the selection of various curves. The selection of the curves depends on the user.
End of note.
In case of a blocked Crypto2304T coprocessor no cryptographic libraries are delivered.
7.1.5 Data Integrity
The TOE shall meet the requirement “Stored data integrity monitoring (FDP_SDI.1)” as specified below:
FDP_SDI.1 Stored data integrity monitoring
Hierarchical to: No other components
Dependencies: No dependencies
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FDP_SDI.1.1 The TSF shall monitor user data stored in containers controlled by the TSF
for inconsistencies between stored data based on the following attributes:
EDC value for ROM and RAM smart parity for the cache and ECC value for
the SOLID FLASH™ NVM and verification of stored data in SOLID FLASH™
NVM.
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: FDP_SDI.1 stored data integrity monitoring
Dependencies: No dependencies
FDP_SDI.2.1 The TSF shall monitor user data stored in containers controlled by the TSF
for data integrity and one- and/or more-bit-errors on all objects, based on the
following attributes: corresponding EDC value for ROM and RAM, smart
parity for Cache and error correction ECC for the SOLID FLASH™ NVM.
FDP_SDI.2.2 Upon detection of a data integrity error, the TSF shall correct 1 bit errors in
the SOLID FLASH™ NVM automatically and inform the user about other bit
errors.
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7.2 TOE Security Assurance Requirements
The evaluation assurance level is EAL 5 augmented with ALC_DVS.2 and AVA_VAN.5. In the following
table, the security assurance requirements are given. The augmentation of the assurance components
compared to [1] is expressed with bold letters.
Table 16: Assurance components
Aspect Acronym Description Refinement
Development
ADV_ARC.1 Security Architecture Description In PP [1]
ADV_FSP.5
Complete semi-formal functional
specification with additional error
information
in ST
ADV_IMP.1 Implementation representation of the TSF in PP [1]
ADV_INT.2 Well-structured internals
ADV_TDS.4 Semi-formal modular design
Guidance Documents
AGD_OPE.1 Operational user guidance in PP [1]
AGD_PRE.1 Preparative procedures in PP [1]
Life-Cycle Support
ALC_CMC.4
Production support, acceptance procedures
and automation
in PP [1]
ALC_CMS.5 Development tools CM coverage in ST
ALC_DEL.1 Delivery procedures in PP [1]
ALC_DVS.2 Sufficiency of security measures in PP [1]
ALC_LCD.1 Developer defined life-cycle model
ALC_TAT.2
Compliance with implementation
standards
Security Target
Evaluation
ASE_CCL.1 Conformance claims
ASE_ECD.1 Extended components definition
ASE_INT.1 ST introduction
ASE_OBJ.2 Security objectives
ASE_REQ.2 Derived security requirements
ASE_SPD.1 Security problem definition
ASE_TSS.1 TOE summary specification
Tests ATE_COV.2 Analysis of coverage in PP [1]
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ATE_DPT.3 Testing: modular design
ATE_FUN.1 Functional testing
ATE_IND.2 Independent testing - sample
Vulnerability
Assessment
AVA_VAN.5 Advanced methodical vulnerability analysis in PP [1]
7.2.1 Refinements
Some refinements are taken unchanged from [1]. Table 16 provides an overview.
Two refinements from the [1] have to be discussed here in the Security Target, as the assurance level is
increased.
7.2.1.1 Life cycle support (ALC_CMS)
The refinement from the [1] can also be applied to the assurance level EAL 5 augmented with ALC_CMS.5.
The assurance package ALC_CMS.4 is extended to ALC_CMS.5 with aspects regarding the configuration
control system for the TOE. The refinement is still valid.
7.2.1.2 Functional Specification (ADV_FSP)
The refinement from the [1] can also be applied to the assurance level EAL 5 augmented with ADV_FSP.5.
The assurance package ADV_FSP.4 is extended to ADV_FSP.5 with aspects regarding the level of
description. ADV_FSP.5 requires a semi-formal description in addition. The refinement is still valid.
For refinement details see [1].
7.3 Security Requirements Rationale
7.3.1 Rationale for the Security Functional Requirements
The security functional requirements rationale of the TOE are defined and described in [1] section 6.3 for the
following security functional requirements: FDP_ITT.1, FDP_IFC.1, FPT_ITT.1, FPT_PHP.3, FPT_FLS.1,
FRU_FLT.2, FMT_LIM.1, FMT_LIM.2, FCS_RNG.1, and FAU_SAS.1.
The security functional requirements FPT_TST.2, FDP_ACC.1, FDP_ACF.1, FMT_MSA.1, FMT_MSA.3,
FMT_SMF.1, FCS_COP.1, FCS_CKM.1, FDP_SDI.1 and FDP_SDI.2 are defined in the following
description:
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Table 17: Rational for additional SFR in the ST
Objective TOE Security Functional Requirements
O.Add-Functions - FCS_COP.1/3DES „Cryptographic operation“
- FCS_COP.1/AES „Cryptographic operation“
- FCS_COP.1/RSA „Cryptographic operation“
- FCS_COP.1/ECDSA „Cryptographic operation“
- FCS_COP.1/ECDH „Cryptographic operation“
- FCS_CKM.1/RSA „Cryptographic key generation “
- FCS_CKM.1/EC „Cryptographic key generation“
O.Phys-Manipulation - FPT_TST.2 „ Subset TOE security testing “
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.Malfunction - FDP_SDI.1 „Stored data integrity monitoring“
- FDP_SDI.2 „Stored data integrity monitoring and action“
The table above gives an overview, how the security functional requirements are combined to meet the
security objectives. The detailed justification is given in the following:
The justification related to the security objective “Additional Specific Security Functionality
(O.Add-Functions)” is as follows:
The security functional requirement(s) “Cryptographic operation (FCS_COP.1)” exactly requires those
functions to be implemented which are demanded by O.Add-Functions. FCS_CKM.1/RSA supports the
generation of RSA keys, FCS_CKM.1/EC supports the generation of EC keys needed for this cryptographic
operations. Therefore, FCS_COP.1/RSA, FCS_COP.1/ECDSA, FCS_COP.1/ECDH and FCS_CKM.1/RSA
and FCS_CKM/EC are suitable to meet the security objective.
The use of the supporting libraries Toolbox and Base has no impact on any security functional requirement
nor does its use generate additional requirements.
Nevertheless, the developer of the Smartcard Embedded Software must ensure that the additional functions
are used as specified and that the User Data processed by these functions are protected as defined for the
application context. These issues are addressed by the specific security functional requirements:
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 [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,
 FMT_MSA.2 Secure security attributes.
All these requirements have to be fulfilled to support OE.Resp-Appl for FCS_COP.1/3DES (3DES algorithm)
and for FCS_COP.1/AES (AES algorithm). For the FCS_COP.1/RSA (RSA algorithm) and
FCS_COP.1/ECDSA and FCS_COP.1/ECDH (both EC algorithms) the FCS_CKM.1/RSA and
FCS_CKM.1/EC are optional, since they are fulfilled by the TOE or may be fulfilled by the environment as the
user can generate keys externally additionally.
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 define how to implement the specific
security functionality. However, key-dependent functions could be implemented in the Smartcard Embedded
Software.
The usage of cryptographic algorithms requires the use of appropriate keys. Otherwise these cryptographic
functions do not provide security. The keys have to be unique with a very high probability, and must have a
certain cryptographic strength etc. In case of a key import into the TOE (which is usually after TOE delivery)
it has to be ensured that quality and confidentiality are maintained. Keys for 3DES and AES are provided by
the environment. Keys for RSA and EC algorithms can be provided either by the TOE or the environment.
In this ST the objectives for the environment OE.Plat-Appl and OE.Resp-Appl have been clarified. The
Smartcard Embedded Software defines the use of the cryptographic functions FCS_COP.1 provided by the
TOE. The requirements for the environment FDP_ITC.1, FDP_ITC.2, FCS_CKM.1, FCS_CKM.4, and
FMT_MSA.2 support an appropriate key management. These security requirements are suitable to meet
OE.Resp-Appl.
The justification of the security objective and the additional requirements (both for the TOE and its
environment) show that they do not contradict the rationale already given in the Protection Profile for the
assumptions, policy and threats defined there.
The security functional component Subset TOE security testing (FPT_TST.2) has been newly created
(Common Criteria Part 2 extended). This component allows that particular parts of the security mechanisms
and functions provided by the TOE can be tested after TOE Delivery. This security functional component is
used instead of the functional component FPT_TST.1 from Common Criteria Part 2. For the user it is
important to know which security functions or mechanisms can be tested. The functional component
FPT_TST.1 does not mandate to explicitly specify the security functions being tested. In addition,
FPT_TST.1 requires verification of the integrity of TSF data and stored TSF executable code which might
violate the security policy.
The tested security enforcing functions are SF_OSC Operating State Checking, SF_CRT Cryptographic
Support and SF_TST Self Test.
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The security functional requirement FPT_TST.2 will detect attempts to conduce a physical manipulation on
the monitoring functions of the TOE. The objective of FPT_TST.2 is O.Phys-Manipulation. The physical
manipulation will be tried to overcome security enforcing functions.
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 as required by O.Mem-Access. The related TOE security functional requirements
FDP_ACC.1, FDP_ACF.1, FMT_MSA.3, FMT_MSA.1 and FMT_SMF.1 cover this security objective. The
implementation of these functional requirements is represented by the dedicated privilege level concept.
The justification of the security objective and the additional requirements show that they do not contradict the
rationale already given in [1] for the assumptions, policy and threats defined there. Moreover, these
additional security functional requirements cover the requirements by [3] user data protection of chapter 11
which are not refined by [1].
Nevertheless, the developer of the Smartcard Embedded Software must ensure that the additional functions
are used as specified and that the User Data processed by these functions are protected as defined for the
application context. The TOE only provides the tool to implement the policy defined in the context of the
application.
The justification related to the security objective “Protection against Malfunction due to Environmental Stress
(O.Malfunction)” is as follows:
The security functional requirement “Stored data integrity monitoring (FDP_SDI.1)” requires the
implementation of an Error Detection (EDC) algorithm which detects integrity errors of the data stored in
RAM and ROM. By this the malfunction of the TOE using corrupt data is prevented. Therefore FDP_SDI.1 is
suitable to meet the security objective.
The security functional requirement “Stored data integrity monitoring and action (FDP_SDI.2)” requires the
implementation of an integrity observation and correction which is implemented by the Error Detection (EDC)
and Error Correction (ECC) measures. The EDC is present in RAM and ROM of the TOE while the ECC is
realized in the SOLID FLASH™ NVM. These measures detect and inform about one and more bit errors. In
case of the SOLID FLASH™ NVM 1 bit errors of the data are corrected automatically. The ECC mechanisms
prevent the TOE from using corrupt data. Therefore FDP_SDI.2 is suitable to meet the security objective.
The CC part 2 defines the component FIA_SOS.2, which is similar to FCS_RNG.1, as follows:
FIA_SOS.2 TSF Generation of secrets
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_SOS.2.1 The TSF shall provide a mechanism to generate secrets that meet
[assignment:a defined quality metric].
FIA_SOS.2.2 The TSF shall be able to enforce the use of TSF generated secrets for
[assignment: list of TSF functions].
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The CC part 2, annex G.3 [3], states: “This family defines requirements for mechanisms that enforce defined
quality metrics on provided secrets, and generate secrets to satisfy the defined metric“. Even the operation in
the element FIA_SOS.2.2 allows listing the TSF functions using the generated secrets. Because all
applications discussed in annex G.3 are related to authentication, the component FIA_SOS.2 is also
intended for authentication purposes while the term “secret” is not limited to authentication data (cf. CC part
2, paragraphs 39-42).
Paragraph 685 in the CC part 2 [CCV31_2] recommends use of the component FCS_CKM.1 to address
random number generation. However, this may hide the nature of the secrets used for key generation and
does not allow describing random number generation for other cryptographic methods (e.g., challenges,
padding), authentication (e.g., password seeds), or other purposes (e.g., blinding as a countermeasure
against side channel attacks).
The component FCS_RNG addresses general RNG, the use of which includes but is not limited to
cryptographic mechanisms. FCS_RNG allows to specify requirements for the generation of random numbers
including necessary information for the intended use. These details describe the quality of the generated
data where other security services rely on. Thus by using FCS_RNG a ST or PP author is able to express a
coherent set of SFRs that include or use the generation of random numbers as a security service.
7.3.1.1 Dependencies of Security Functional Requirements
The dependencies of security functional requirements are defined and described in [1] section 6.3.2 for the
following security functional requirements: FDP_ITT.1, FDP_IFC.1, FPT_ITT.1, FPT_PHP.3, FPT_FLS.1,
FRU_FLT.2, FMT_LIM.1, FMT_LIM.2, FCS_RNG.1 and FAU_SAS.1.
The dependencies of security functional requirements for the security functional requirements FPT_TST.2,
FDP_ACC.1, FDP_ACF.1, FMT_MSA.1, FMT_MSA.3, FMT_SMF.1, FCS_COP.1, FCS_CKM.1, FDP_SDI.1
and FDP_SDI.2 are defined in the following description.
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Table 18: Dependency for cryptographic operation requirement
Security Functional
Requirement
Dependencies
Fulfilled by security
requirements
FCS_COP.1/3DES
FCS_CKM.1 Yes, see comment 3
FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1)
FCS_CKM.4
Yes, see comment 3
FCS_COP.1/AES
FCS_CKM.1 Yes, see comment 3
FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1)
FCS_CKM.4
Yes, see comment 3
FCS_COP.1/RSA
FCS_CKM.1 Yes, see comment 3
FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1)
FCS_CKM.4
Yes, see comment 3
FCS_CKM.1/RSA
FCS_CKM.2 or FCS_COP.1 Yes
FMT_MSA.2
FCS_CKM.4
Yes, see comment 3
FCS_COP.1/ECDSA
FCS_CKM.1 Yes, see comment 3
FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1)
FCS_CKM.4
Yes, see comment 3
FCS_CKM.1/EC
FCS_CKM.2 or FCS_COP.1 Yes
FMT_MSA.2
FCS_CKM.4
Yes, see comment 3
FCS_COP.1/ECDH
FCS_CKM.1 Yes, see comment 3
FDP_ITC.1 or FDP_ITC.2 (if not FCS_CKM.1)
FCS_CKM.4
Yes, see comment 3
FPT_TST.2 None see comment 1
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
Not required,
see comment 2
FMT_MSA.1
FDP_ACC.1 or FDP_IFC.1
FMT_SMR.1
Yes
see comment 2
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Security Functional
Requirement
Dependencies
Fulfilled by security
requirements
FMT_SMF.1 Yes
FMT_SMF.1 None N/A
FDP_SDI.1 None N/A
FDP_SDI.2 None N/A
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Comment 1:
The TOE is already a platform representing the lowest level in a Smartcard. There is no lower or »underlying
abstract machine« used by the TOE which can be tested. Therefore, the former dependency to FPT_AMT.1
is fulfilled without further and by that dispensable. CC in the Revision 3 considered this and dropped this
dependency. The requirement FPT_TST.2 is satisfied.
End of comment.
Comment 2:
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.
End of comment.
Comment 3:
The security functional requirement “Cryptographic operation (FCS_COP.1)” met by the TOE has the
following dependencies:
- [FDP_ITC.1 Import of user data without security attributes, or
- FDP_ITC.2 Import of user data with security attributes]
- FCS_CKM.1 Cryptographic key generation
- FCS_CKM.4 Cryptographic key destruction.
The security functional requirement “Cryptographic key management (FCS_CKM)” met by TOE has the
following dependencies:
- [FCS_CKM.2 Cryptographic key distribution, or
- FCS_COP.1 Cryptographic operation]
- FCS_CKM.4 Cryptographic key destruction
- FMT_MSA.2 Cryptographic key destruction.
These requirements all address the appropriate management of cryptographic keys used by the specified
cryptographic function and are not part of the [1]. Most requirements concerning key management shall be
fulfilled by the environment since the Smartcard Embedded Software is designed for a specific application
context and uses the cryptographic functions provided by the TOE.
For the security functional requirement FCS_COP.1/3DES and FCS_COP.1/AES the respective
dependencies FCS_CKM.1, FCS_CKM.4 and FDP_ITC.1 or FDP_ITC.2 have to be fulfilled by the
environment. That means, that the environment shall meet the requirements FCS_CKM.1 and FCS_CKM.4
as defined in [3], section 10.1 and shall meet the requirements FDP_ITC.1 or FDP_ITC.2 as defined in [3],
section 11.7.
For the security functional requirement FCS_COP.1/RSA, FCS_COP.1/ECDSA and FCS_COP.1/ECDH the
respective dependencies FCS_CKM.4 and FDP_ITC.1 or FDP_ITC.2 have to be fulfilled by the environment.
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That mean, that the environment shall meet the requirements FDP_ITC.1 or FDP_ITC.2 as defined in [3],
section 11.7. The respective dependency FCS_CKM.1 has to be fulfilled by the TOE with the security
functional requirement FCS_CKM.1/RSA (for FCS_COP.1/RSA) and FCS_CKM.1/EC (for
FCS_COP.1/ECDSA and FCS_COP.1/ECDH) as defined in section 7.1.4. Additionally the requirement
FCS_CKM.1 can be fulfilled by the environment as defined in [3], section 10.1.
For the security functional requirement FCS_CKM.1/RSA and FCS_CKM.1/EC the respective dependency
FCS_COP.1 is fulfilled by the TOE. The respective dependencies FMT_MSA.2 and FCS_CKM.4 have to be
fulfilled by the environment. That means, the environment shall meet the requirement FCS_CKM.4 as
defined in [3], section 10.1 and the requirement FMT_MSA.2 as defined in [3], section 13.2.
The cryptographic libraries RSA and EC and the Toolbox library are delivery options. . If one of the libraries
RSA, EC or Toolbox are delivered, the Base Lib is automatically part of it. Therefore the user may choose a
free combination of these libraries. In case of deselecting one or several of these libraries the TOE does not
provide the respective functionality Additional Specific Security Functionality Rivest-Shamir-Adleman
Cryptography (RSA) and/or Elliptic Curve Cryptography (EC). The Toolbox and Base Library are no
cryptographic libraries and provide no additional specific security functionality.
End of Comment.
7.3.2 Rationale of the Assurance Requirements
The chosen assurance level EAL5 and the augmentation with the requirements ALC_DVS.2 and
AVA_VAN.5 were chosen in order to meet the assurance expectations explained in the following
paragraphs. In Table 16 the different assurance levels are shown as well as the augmentations. The
augmentations are in compliance with the Protection Profile.
An assurance level EAL5 with the augmentations ALC_DVS.2 and AVA_VAN.5 are required for this type of
TOE since it is intended to defend against highly sophisticated attacks without protective environment.
This evaluation assurance package was selected 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 defence against such attacks, the evaluators should
have access to all information regarding the TOE including the TSF internals, the low level design and
source code including the testing of the modular design. Additionally the mandatory technical document [11]
shall be taken as a basis for the vulnerability analysis of the TOE.
ALC_DVS.2 Sufficiency of security measures
Development security is concerned with physical, procedural, personnel and other technical measures that
may be used in the development environment to protect the TOE.
In the particular case of a Security IC the TOE is developed and produced within a complex and distributed
industrial process which must especially be protected. Details about the implementation, (e.g. from design,
test and development tools as well as Initialization Data) may make such attacks easier. Therefore, in the
case of a Security IC, maintaining the confidentiality of the design is very important.
This assurance component is a higher hierarchical component to EAL5 (which only requires ALC_DVS.1).
ALC_DVS.2 has no dependencies.
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AVA_VAN.5 Advanced methodical vulnerability analysis
Due to the intended use of the TOE, it must be shown to be highly resistant to penetration attacks. This
assurance requirement is achieved by AVA_VAN.5.
Independent vulnerability analysis is based on highly detailed technical information. The main intent of the
evaluator analysis is to determine that the TOE is resistant to penetration attacks performed by an attacker
possessing high attack potential.
AVA_VAN.5 has dependencies to ADV_ARC.1 “Security architecture description”, ADV_FSP.2 “Security
enforcing functional specification”, ADV_TDS.3 “Basic modular design”, ADV_IMP.1 “Implementation
representation of the TSF”, AGD_OPE.1 “Operational user guidance”, and AGD_PRE.1 “Preparative
procedures”.
All these dependencies are satisfied by EAL5.
It has to be assumed that attackers with high attack potential try to attack Security ICs like smartcards used
for digital signature applications or payment systems. Therefore, specifically AVA_VAN.5 was chosen in
order to assure that even these attackers cannot successfully attack the TOE.
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8 TOE Summary Specification (ASE_TSS)
The product overview is given in Section 2.1. The Security Features are described below and the relation to
the security functional requirements is shown.
The TOE is equipped with the following security features to meet the security functional requirements:
Table 19: TOE Security Features
SF_DPM Device Phase Management
SF_PS Protection against Snooping
SF_PMA Protection against Modification Attacks
SF_PLA Protection against Logical Attacks
SF_CS Cryptographic Support
The following description of the security features is a complete representation of the TSF.
8.1 SF_DPM: Device Phase Management
The life cycle of the TOE is split up into several phases. Different operation modes help to protect the TOE
during each phase of its lifecycle.
8.2 SF_PS: Protection against Snooping
The TOE uses various means to protect from snooping of memories and busses and prevents single
stepping.
8.3 SF_PMA: Protection against Modifying Attacks
This TOE implements protection against modifying attacks of memories, alarm lines and sensors.
8.4 SF_PLA: Protection against Logical Attacks
Memory access of the TOE is controlled by a Memory Management Unit (MMU), which implements different
priviledge levels. The MMU decides, whether access to a physical memory location is allowed based on the
access rights of the privilege levels.
8.5 SF_CS: Cryptographic Support
The TOE is equipped with an asymmetric and a symmetric hardware accelerator and also software modules
to support several symmetric and asymmetric cryptographic operations. It further provides random numbers
to meet FCS_RNG.1.
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8.6 Assignment of Security Functional Requirements to TOE’s Security
Functionality
The justification and overview of the mapping between security functional requirements (SFR) and the TOE’s
security functionality (SF) is given in the sections above. The results are shown in Table 20. The security
functional requirements are addressed by at least one related security feature.
Table 20: Mapping of SFR and SF
SFR SF_DPM SF_PS SF_PMA SF_PLA SF_CS
FAU_SAS.1 X
FMT_LIM.1 X
FMT_LIM.2 X
FDP_ACC.1 X X X
FDP_ACF.1 X X X
FPT_PHP.3 X X X X X
FDP_ITT.1 X X X X X
FDP_SDI.1 X
FDP_SDI.2 X
FDP_IFC.1 X X X
FMT_MSA.1 X X X
FMT_MSA.3 X X X
FMT_SMF.1 X X X
FRU_FLT.2 X
FPT_ITT.1 X X X X
FPT_TST.2 X X
FPT_FLS.1 X X X X
FCS_RNG.1 X
FCS_COP.1
/3DES X
FCS_COP.1
/AES X
FCS_COP.1
/RSA X
FCS_COP.1
/ECDSA X
FCS_COP.1
/ECDH X
FCS_CKM.1
/RSA X
FCS_CKM.1
/EC X
8.7 Security Requirements are internally Consistent
For this chapter [1] section 6.3.4 can be applied completely.
In addition to the discussion of section 6.3 of [1] the security functional requirement FCS_COP.1 is
introduced. 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 also protect the cryptographic
algorithms implemented according to the security functional requirement FCS_COP.1. Therefore, these
security functional requirements support the secure implementation and operation of FCS_COP.1.
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The functional requirement FPT_TST.2 requires further protection to prevent manipulation of test results,
while checking the security functions of the TOE..An attacker could aim to switch off or disturb certain
sensors or filters and prevent the detection of distortion by blocking the correct operation of FPT_TST.2. 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 also protect the security functional requirement
FPT_TST.2. Therefore, the related security functional requirements support the secure implementation and
operation of FPT_TST.2.
The requirement FPT_TST.2 allows testing of some security mechanisms by the Smartcard Embedded
Software after delivery.
The implemented privilege level concept represents the area based memory access protection enforced by
the MMU. As an attacker could attempt to manipulate the level concept as defined and present in the TOE,
the functional requirement FDP_ACC.1 and the related other requirements have to be protected. The
security functional requirements necessary to meet the security objectives O.Leak-Inherent, O.Phys-Probing,
O.Malfunction, O.Phys-Manipulation and O.Leak-Forced also protect the area based memory access control
function implemented according to the security functional requirement described in the security functional
requirement FDP_ACC.1 with reference to the Memory Access Control Policy and details given in
FDP_ACF.1. Therefore, those security functional requirements support the secure implementation and
operation of FDP_ACF.1 with its dependent security functional requirements.
The requirement FDP_SDI.2.1 allows detection of integrity errors of data stored in memory. FDP_SDI.2.2 in
addition allows correction of one bit errors or taking further action. Both meet the security objective
O.Malfunction. The requirements FRU_FLT.2, FPT_FLS.1, and FDP_ACC.1 which also meet this objective
are independent from FDP_SDI.2 since they deal with the observation of the correct operation of the TOE
and not with the memory content directly.
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9 References
9.1 Literature
[1] Security IC Platform Protection Profile, Version 1.0, 15.06.2007, BSI-PP-0035
[2] Common Criteria for Information Technology Security Evaluation Part 1: Introduction and
General Model; Version 3.1 Revision 4 September 2012, CCMB-2012-09-001
[3] Common Criteria for Information Technology Security Evaluation Part 2: Security
Functional Requirements; Version 3.1 Revision 4 September 2012, CCMB-2012-09-002
[4] Common Criteria for Information Technology Security Evaluation Part 3: Security
Assurance Requirements; Version 3.1 Revision 4 September 2012, CCMB-2012-09-003
[5] Status report, List of all available user guidance
[6] Functionality classes and evaluation methodology for physical random number generators
AIS31, Version 3.0, .2013-05
[7] SLx 70 Family Hardware Reference Manual , Infineon Technologies AG
[11] Joint Interpretation Library, Application of Attack Potential to Smartcards, Version 2.9, January 2013
[12] M7790 M7791 M7793 M7794 Errata Sheet
[13] SLE 70 Family Programmer’s Reference User’s Manual, Infineon Technologies AG,
[14] NIST: FIPS publication 186-4: Digital Signature Standard (DSS), July 2013
[15] IETF: RFC 5639, Elliptic Curve Cryptography (ECC) Brainpool Standard Curves and Curve
Generation, March 2010, http://www.ietf.org/rfc/rfc5639.txt
[18] SLx 70 Family Production and Personalization User's Manual
[19] Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher, Revised January
2012, NIST Special Publication 800-67, Revision 1
[20] U.S. Department of Commerce, National Institute of Standards and Technology, Information
Technology Laboratory (ITL), Advanced Encryption Standard (AES), FIPS PUB 197
[21] PKCS #1: RSA Cryptography Standard, v2.1, June 14, 2002, RSA Laboratories
[22] American National Standard for Financial Services ANS X9.62-2005, Public Key Cryptography for
the Financial Services Industry, The Elliptic Curve Digital Signature Algorithm (ECDSA), November
16, 2005, American National Standards Institute
[23] American National Standard for Financial Services X9.63-2001, Public Key Cryptography for the
Financial Services Industry: Key Agreement and Key Transport Using Elliptic Curve Cryptography,
November 20, 2001, American National Standards Institute
[24] Act on the Federal Office for Information Security (BSI-Gesetz – BSIG) of 14
th
of August 2009,
Bundesgesetzblatt I p. 2821
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Note that the versions of these documents will be defined at the end of the evaluation and listed in the
certification report.
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10 Appendix
In Table 21 and in Table 22 the hash signatures of the respective CL70 Crypto Library file are documented.
For convenience purpose several hash values are referenced.
Table 21: Reference hash values of the CL70 Crypto Libraries v1.02.010
Library Hash Value
Cl77-LIB-toolbox-XSMALL-HUGE.lib
MD5 ad6957cb996ae91c497f36dd779966d7
SHA1 3456f98ea2f3ffb92cc6b4ce46da3e736f701a28
SHA256 9b4b23001cb400ea2bea9e8f34a870a5ff6541965ca568538c3adf0911b7229f
Cl77-LIB-base-XSMALL-HUGE.lib
MD5 aad4d845f85995cb7398401f74c81436
SHA1 b2eb9a36a4b8b8c8c58b534ed33ad5ca79970a90
SHA256 bfebde15ec7856285a3ef5b47e2e124f33664f041c0ed08fb00793fd5c47841f
Cl77-LIB-2k-XSMALL-HUGE.lib
MD5 173e460ee7a9b0aaefd601497228762b
SHA1 dc537705ef1f124ba05c57c103ab3d8fd7413059
SHA256 0aaf92505015f8d3ae902caf35c92234e2e2dfbba975ea7c893c7da23ba8d8db
Cl77-LIB-4k-XSMALL-HUGE.lib
MD5 2d56f41542d202c8c76b37c02ea3b548
SHA1 6cf3d9c985775f2f6bb4ff58e4f022012c5d8c72
SHA256 374e4e6ded895b7b720045b16e62310245e3df53bffbcbcc71464345de728d23
Cl77-LIB-ecc-XSMALL-HUGE.lib
MD5 5ba06504ff48113e4c4a8ed3e1cd651a
SHA1 1d900546d5613d8bd21ebf61dc2bed5e48584d91
SHA256 8064a397767f1d704b9713031b626b33cfe6b6a3c780de5d8435b091feb2511a
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Table 22: Reference hash values of the CL70 Crypto Libraries v1.02.013
Library Hash Value
Cl77-LIB-toolbox-XSMALL-HUGE.lib
MD5 fc5e14e4a5690a1d2c9b0d183c92bde1
SHA1 2a187ec684ce16ef3a1ec918ad2e778deaa2aed6
SHA256 39ea577e35e07c8169615bc658d30a6b372095c72c927c79894c259b2b85f630
Cl77-LIB-base-XSMALL-HUGE.lib
MD5 833b82e7ed7b08633a21bd3278ea6f97
SHA1 4c2a943d58d5189bacca44399698b489ab9007bb
SHA256 3d41010b92dc15cfb7d0460f844c34054edf4369011a6d703d70b1e4dae17f77
Cl77-LIB-2k-XSMALL-HUGE.lib
MD5 be6e8305d6d00fd2b7017a156018807f
SHA1 3a9d60b79b29e5be7272d12f555b23923c2359c4
SHA256 b5cc208e2bc26b7c0f32253c54b222f9e3893b35c9ffe12451d67b7239f027b1
Cl77-LIB-4k-XSMALL-HUGE.lib
MD5 953458dcf8ce2c13dddf4bca149be3e5
SHA1 8a5f88ae75d494d788eec2d548d17464b1d6c583
SHA256 3ce380473d65fe7891bbe74a298360f75d2e3d64a025078e901b062b8e68040a
Cl77-LIB-ecc-XSMALL-HUGE.lib
MD5 9cebff83045e4b78aab3db4d59fb529f
SHA1 467912f321822170a5ff571884f6a3ff4b62880a
SHA256 5bc24bda66650347d681fbf78b65aac3b28648e437fb059d8817edffb03dd946
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11 List of Abbreviations
AES Advanced Encryption Standard
AIS31 “Anwendungshinweise und Interpretationen zu ITSEC und CC
Funktionalitätsklassen und Evaluationsmethodologie für physikalische
Zufallszahlengeneratoren”
API Application Programming Interface
ATR Answer to Reset
CC Common Criteria
GCIM Generic Chip Identification Mode
CPU Central Processing Unit
CRC Cyclic Redundancy Check
Crypto2304T Asymmetric Cryptographic Processor
CRT Chinese Reminder Theorem
DPA Differential Power Analysis
DFA Differential Failure Analysis
EC Elliptic Curve
ECC Error Correction Code
EDC Error Detection Code
EEPROM Electrically Erasable and Programmable Read Only Memory
EMA Electro magnetic analysis
Flash Flash Memory
HW Hardware
IC Integrated Circuit
ICO Internal Clock Oscillator
ID Identification
IFX Infineon
IMM Interface Management Module
ITP Interrupt and Peripheral Event Channel Controller
I/O Input/Output
ITSEC Information Technology Security Evaluation Criteria
MED Memory Encryption and Decryption
MMU Memory Management Unit
O Object
OS Operating system
PEC Peripheral Event Channel
PRNG Pseudo Random Number Generator
RAM Random Access Memory
RMS Resource Management System
RNG Random Number Generator
ROM Read Only Memory
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RSA Rivest-Shamir-Adleman Algorithm
SAM Service Algorithm Minimal
SCP Symmetric Cryptographic Processor
TSC TOE Security Functions Control
TSF TOE Security Functionality
UART Universal Asynchronous Receiver/Transmitter
UMSLC User mode Security Life Control
WDT Watch Dog Timer
3DES Triple DES Encryption Standard
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12 Glossary
Application Program/Data Software which implements the actual TOE functionality provided for
the user or the data required for that purpose
Central Processing Unit Logic circuitry for digital information processing
Chip Identification Data Data to identify the TOE
Generic Chip Identification Mode Operational status phase of the TOE, in which actions for identifying the
individual chip by transmitting the Chip Identification Data take place
Memory Encryption and Decryption
Method of encoding/decoding data transfer between CPU and memory
Memory Hardware part containing digital information (binary data)
Microprocessor CPU with peripherals
Object Physical or non-physical part of a system which contains information
and is acted upon by subjects
Operating System Software which implements the basic TOE actions necessary for
operation
Programmable Read Only Memory
Non-volatile memory which can be written once and then only permits
read operations
Random Access Memory Volatile memory which permits write and read operations
Random Number Generator Hardware part for generating random numbers
Read Only Memory Non-volatile memory which permits read operations only
Resource Management System Part of the firmware containing NVM programming routines, AIS31
testbench etc.
Self Test Software Part of the firmware with routines for controlling the operating state and
testing the TOE hardware
Security Function Part(s) of the TOE used to implement part(s) of the security objectives
Security Target Description of the intended state for countering threats
SmartCard Plastic card in credit card format with built-in chip
Software Information (non-physical part of the system) which is required to
implement functionality in conjunction with the hardware (program
code)
Subject Entity, generally in the form of a person, who performs actions
Target of Evaluation Product or system which is being subjected to an evaluation
Test Mode Operational status phase of the TOE in which actions to test the TOE
hardware take place
Threat Action or event that might prejudice security
User Mode Operational status phase of the TOE in which actions intended for the
user takes place

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