PREMIER MINISTRE
Secretariat General for National Defence
Central Directorate for Information Systems Security
Certification Report DCSSI-2008/10
ATMEL Secure Microcontroller
AT90SC256144RCFT / AT90SC25672RCFT
rev. E
Paris, 25th
of March 2008
Courtesy Translation
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 2 out 16 CER/F/07.5
Warning
This report is designed to provide sponsors with a document enabling them to assess the
security level of a product under the conditions of use and operation defined in this report for
the evaluated version. It is also designed to provide the potential purchaser of the product with
the conditions under which he may operate or use the product so as to meet the conditions of
use for which the product has been evaluated and certified; that is why this certification report
must be read alongside the evaluated user and administration guidance, as well as with the
product security target, which presents threats, environmental assumptions and the supposed
conditions of use so that the user can judge for himself whether the product meets his needs in
terms of security objectives.
Certification does not, however, constitute a recommendation product from DCSSI (Central
Directorate for Information Systems Security), and does not guarantee that the certified
product is totally free of all exploitable vulnerabilities.
Any correspondence about this report has to be addressed to:
Secrétariat Général de la Défense Nationale
Direction Centrale de la Sécurité des Systèmes d'Information
Centre de certification
51, boulevard de la Tour Maubourg
75700 PARIS cedex 07 SP
France
certification.dcssi@sgdn.gouv.fr
Reproduction of this document without any change or cut is authorised.
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 3 out 16
Certification report reference
DCSSI-2008/10
Product name
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Product reference
AT90SC256144RCFT / AT90SC25672RCFT,
reference AT58879 revision E
Protection profile conformity
PP BSI-PP-0002-2001
Evaluation criteria and version
Common Criteria version 2.3
compliant with ISO 15408:2005
Evaluation level
EAL 4 augmented
AADV_IMP.2, ALC_DVS.2, AVA_MSU.3, AVA_VLA.4
Developer
ATMEL Secure Microcontroller Solutions
Maxwell Building - Scottish Enterprise technology Park, East Kilbride,
Glasgow G75 0QR, Scotland
Sponsor
ATMEL Secure Microcontroller Solutions
Maxwell Building - Scottish Enterprise technology Park, East Kilbride,
Glasgow G75 0QR, Scotland
Evaluation facility
Serma Technologies
30 avenue Gustave Eiffel, 33608 Pessac, France
Phone: +33 (0)5 57 26 08 75, email : e.francois@serma.com
Recognition arrangements
CCRA
The product is recognised at EAL4 level.
SOG-IS
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 4 out 16 CER/F/07.5
Introduction
The Certification
Security certification for information technology products and systems is governed by decree
number 2002-535 dated April, 18th 2002, and published in the "Journal Officiel de la
République Française". This decree stipulates that:
• The central information system security department draws up certification reports.
These reports indicate the features of the proposed security targets. They may include
any warnings that the authors feel the need to mention for security reasons. They may
or may not be transmitted to third parties or made public, as the principals desire
(article 7).
• The certificates issued by the Prime Minister certify that the copies of the products or
systems submitted for evaluation fulfil the specified security features. They also
certify that the evaluations have been carried out in compliance with applicable rules
and standards, with the required degrees of skill and impartiality (article 8).
The procedures are available on the Internet site www.ssi.gouv.fr.
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 5 out 16
Content
1. THE PRODUCT........................................................................................................................... 6
1.1. PRESENTATION OF THE PRODUCT........................................................................................... 6
1.2. EVALUATED PRODUCT DESCRIPTION ..................................................................................... 6
1.2.1. Product identification.................................................................................................... 6
1.2.2. Security services............................................................................................................ 6
1.2.3. Architecture................................................................................................................... 7
1.2.4. Life cycle ....................................................................................................................... 8
1.2.5. Evaluated configuration................................................................................................ 9
2. THE EVALUATION.................................................................................................................. 10
2.1. EVALUATION REFERENTIAL ................................................................................................. 10
2.2. EVALUATION WORK ............................................................................................................. 10
2.3. CRYPTOGRAPHIC MECHANISMS ROBUSTNESS ANALYSIS..................................................... 10
2.4. RANDOM NUMBER GENERATOR ANALYSIS .......................................................................... 10
3. CERTIFICATION...................................................................................................................... 11
3.1. CONCLUSION........................................................................................................................ 11
3.2. RESTRICTIONS...................................................................................................................... 11
3.3. RECOGNITION OF THE CERTIFICATE..................................................................................... 11
3.3.1. European recognition (SOG-IS).................................................................................. 11
3.3.2. International common criteria recognition (CCRA)................................................... 12
ANNEX 1. EVALUATION LEVEL OF THE PRODUCT.......................................................... 13
ANNEX 2. EVALUATED PRODUCT REFERENCES .............................................................. 14
ANNEX 3. CERTIFICATION REFERENCES ........................................................................... 16
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 6 out 16 CER/F/07.5
1. The product
1.1. Presentation of the product
The evaluated product is the ATMEL Secure Microcontroller AT90SC256144RCFT
reference AT58879 rev. E developed by ATMEL Secure Microcontroller Solutions.
The reference AT90SC25672RCFT identifies the same hardware product but is different for
marketing purposes only.
This product belongs to the AVR ASL4 family developed by ATMEL Secure Microcontroller
Solutions.
The microcontroller aims to host one or several software applications and can be embedded in
a plastic support to create a Smartcard with multiple possible usages (secure identity
documents, banking, health card, pay-TV or transport applications…) depending on the
Embedded Software applications. However, only the microcontroller is evaluated. The
software applications are not in the scope of this evaluation.
1.2. Evaluated product description
The security target [ST] defines the evaluated product, its evaluated security functionalities
and its operation environment.
This security target is compliant to [PP0002] protection profile.
1.2.1. Product identification
The configuration list [CONF] identifies the product’s constituent elements.
The certified version of the product can be identified by the following elements:
- Product name: AT90SC256144RCFT / AT90SC25672RCFT, and product
identification number: AT58879. This information can be checked using Serial
number register SN_0, which content should be hexadecimal 0x2C (see [GUIDES],
“AT90SC256144RCFT Technical Data Sheet” section 23.1.1),
Silicon revision: E. This information can be checked using Serial number register
SN_1, which content should be hexadecimal 0x44 (see [GUIDES],
“AT90SC256144RCFT Technical Data Sheet” section 23.1.2),
- The TOE can be physically identified by the mask numbers visible on the metal layer,
and listed in the “Patern and mask list” document (cf. [CONF]).
1.2.2. Security services
The product provides mainly the following security services:
- Test Mode Entry,
- Protected Test Memory Access,
- Test Mode Disable,
- TOE Testing,
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 7 out 16
- Data Error Detection,
- FireWall,
- Event Audit,
- Event Action,
- Unobservability,
- Cryptography,
- Package mode entry,
- Test Memory Access in Package Mode.
1.2.3. Architecture
The AT90SC256144RCFT / AT90SC25672RCFT microcontroller is made up of:
- AVR Risk processing unit,
- 224Kb of program ROM memory,
- 144Kb of EEPROM program/data memory including 128 bytes of One Time
Programmable (OTP) memory and a 384-byte of bit-addressable area,
- 8Kb of static RAM memory,
- a 32bit Checksum Accelerator,
- a CRC-16/32 peripheral,
- programmable Internal Oscillator,
- a Random Number Generator,
- a fast hardware DES/3DES peripheral,
- a 32-bit Cryptographic Accelerator (AdvX for Public Key Operations), with 32ko of
ROM memory dedicated to embed a cryptographic library,
- detectors which monitor voltage, frequency and temperature,
- a firewall that protects all memories, peripheral and IO register accesses,
- a power management system,
- logic peripherals including 3 timers, 2 serial ports, an ISO7816 interface and an
ISO7816 controller, a contactless interface with full support for ISO/IEC 14443 type
A and B,
- a dedicated test structure that can be used only in test mode for production testing, and
sawn before IC packaging.
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 8 out 16 CER/F/07.5
1.2.4. Life cycle
The product’s life cycle is organised as follow:
Phase 1
Phase 2
Phase 3
Phase 4
Phase 5
Phase 6
Phase 7
Smartcard embedded
software development
Product
construction
IC design with its dedicated
software
Smartcard IC database
construction
IC photomask fabrication
IC testing and prepersonalisation
IC manufacturing
Testing
IC packaging
Testing
Smartcard product finishing process
Testing
Personalisation
Smartcard product end-
usage
Poduct
usage
End of life process
Légende
Trusted delivery and
verification procedures
Delivery done within
secure environment
Phases
supposed
to
be
secured
ATMEL EKB
ATMEL RFO
Toppan Photomasks
France
ATMEL RFO
ATMEL EKB
Phase 1
Phase 2
Phase 3
Phase 4
Phase 5
Phase 6
Phase 7
Smartcard embedded
software development
Product
construction
IC design with its dedicated
software
Smartcard IC database
construction
IC photomask fabrication
IC testing and prepersonalisation
IC manufacturing
Testing
IC packaging
Testing
Smartcard product finishing process
Testing
Personalisation
Smartcard product end-
usage
Poduct
usage
End of life process
Légende
Trusted delivery and
verification procedures
Delivery done within
secure environment
Légende
Trusted delivery and
verification procedures
Delivery done within
secure environment
Phases
supposed
to
be
secured
ATMEL EKB
ATMEL RFO
Toppan Photomasks
France
ATMEL RFO
ATMEL EKB
Figure 1 – standard IC life-cycle
The product is designed and tested by:
Atmel East Kilbride
Maxwell Building
Scottish Enterprise technology Park
East Kilbride
Glasgow G75 0QR,
Scotland.
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 9 out 16
The database of the product and the manufacturing of the product are performed by:
Atmel Rousset
Z.I. Rousset Peynier
13106 Rousset Cedex
France.
The photo masks of the product are manufactured by:
Toppan Photomasks France
224, bd John Kennedy
91100 Corbeil Essonnes
France.
The product can be in one of its three possible modes:
- “Test” mode: mode in which the microcontroller runs under the control of dedicated
test software written to EEPROM via a test interface, and in conjunction with stimulus
provided by an external test system. This mode is intended to be used solely by
authorized development staff. After the testing activity, the tests interface is definitely
deactivated by sawing the wafer and cannot be accessed any more.
- “User” mode: mode, in which the microcontroller runs under control of the smartcard
embedded software. It is intended that customers and end-users will always use the
microcontroller in user mode.
- “Package” mode: this mode is similar to Test Mode for testing returns from Phases 4-
7. Package mode runs a limited subset of test commands via a test interface, and in
conjunction with stimulus provided by an external test system. This mode is intended
to be used solely by authorized staff.
1.2.5. Evaluated configuration
This certification report applies to the microcontroller only. Any other software used for the
evaluation are not part of the scope of certification. In particular, the “toolbox” cryptographic
library developer by ATMEL is not part of the evaluation scope.
With regard to the life-cycle, the evaluated product is the one at the end of its manufacturing
phase (phase 3).
For the evaluation needs, the product AT90SC256144RCFT / AT90SC25672RCFT was
provided to the ITSEF with a dedicated test embedded software, in a mode known as “open1
”.
1
mode that enables to load and execute a native code in EEPROM and also to disable the configurable security
mechanisms
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 10 out 16 CER/F/07.5
2. The evaluation
2.1. Evaluation referential
The evaluation has been performed in compliance with Common Criteria version 2.3 [CC]
and with the Common Evaluation Methodology [CEM].
For assurance components above EAL4 level, the evaluation facility own evaluation methods
consistent with [AIS 34], validated by DCSSI have been used.
In order to meet the specificities of smart cards, the [CC IC] and [CC AP] guides have been
applied.
2.2. Evaluation work
The evaluation technical report [ETR], delivered to DCSSI the 19th
of March 2008, provides
details on the work performed by the evaluation facility and assesses that all evaluation tasks
are “pass”.
2.3. Cryptographic mechanisms robustness analysis
The evaluated product provides cryptographic services identified §1.2.3, but as these services
do not concur to the products security they cannot be analysed from a cryptographic point of
view; their robustness depends on the way they are used by the application embedded in the
microcontroller.
2.4. Random number generator analysis
The evaluated product provides a hardware random number generator that can be used by the
embedded software. The generator has been analysed by the evaluator.
The generator reaches [FIPS 140] requirements1
. However, if the random number generator is
used for cryptographic purposes, the hardware-generated numbers shall be reprocessed by a
cryptographic algorithm as specified in the document [REF-CRY].
1
Only the [FIPS 140-2] subset related to random number generators has been evaluated and only regarding the
statistical tests specified in the standard.
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 11 out 16
3. Certification
3.1. Conclusion
The evaluation was carried out according to the current rules and standards, with the required
competency and impartiality for a licensed evaluation facility. All the work performed permits
the release of a certificate in conformance with the decree 2002-535.
This certificate testifies that the product ATMEL secure microcontroller
AT90SC256144RCFT / AT90SC25672RCFT rev. E submitted for evaluation fulfils the
security features specified in its security target [ST] for the evaluation level EAL 4
augmented.
3.2. Restrictions
This certificate only applies on the product specified in chapter 1.2 of this certification report.
This certificate provides a resistance assessment of the AT90SC256144RCFT /
AT90SC25672RCFT product to a set of attacks which remains generic due to the missing of
any specific embedded application. Therefore, the security of a final product based on the
evaluated microcontroller would only be assessed through the final product evaluation, which
could be performed on the basis of the current evaluation results.
The user of the certified product shall respect the operational environmental security
objectives summarized specified in the security target [ST] and shall respect the
recommendations in the guidance [GUIDES].
3.3. Recognition of the certificate
3.3.1. European recognition (SOG-IS)
This certificate is issued in accordance with the provisions of the SOG-IS agreement [SOG-
IS].
The European Recognition Agreement made by SOG-IS in 1999 allows recognition from
Signatory States of the agreement1
, of ITSEC and Common Criteria certificates. The
European recognition is applicable up to ITSEC E6 and CC EAL7 levels. The certificates that
are recognized in the agreement scope are released with the following marking:
1 The signatory countries of the SOG-IS agreement are: Finland, France, Germany, Greece, Italy, The
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 12 out 16 CER/F/07.5
3.3.2. International common criteria recognition (CCRA)
This certificate is released in accordance with the provisions of the CCRA [CC RA].
The Common Criteria Recognition Arrangement allows the recognition, by signatory
countries1
, of the Common Criteria certificates. The mutual recognition is applicable up to the
assurance components of CC EAL4 level and also to ALC_FLR family. The certificates that
are recognized in the agreement scope are released with the following marking:
1 The signatory countries of the CCRA arrangement are: Australia, Austria, Canada, Czech Republic, Denmark,
Finland, France, Germany, Greece, Hungary, India, Israel, Italy, Japan, the Republic of Korea, Malaysia,
Netherlands, New-Zealand, Norway, Singapore, Spain, Sweden, Turkey, the United Kingdom and the United
States of America.
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 13 out 16
Annex 1. Evaluation level of the product
Components by assurance level Assurance level of the product
Class Family
EAL
1
EAL
2
EAL
3
EAL
4
EAL
5
EAL
6
EAL
7
EAL
4+
Name of the component
ACM_AUT 1 1 2 2 1 Partial CM automation
ACM_CAP 1 2 3 4 4 5 5 4
Configuration support and
acceptance procedures
ACM
Configuration
management
ACM_SCP 1 2 3 3 3 2
Problem tracking CM
coverage
ADO_DEL 1 1 2 2 2 3 2 Detection of modification
ADO
Delivery and
operation ADO_IGS 1 1 1 1 1 1 1 1
Installation, generation and
start-up procedures
ADV_FSP 1 1 1 2 3 3 4 2
Fully defined external
interfaces
ADV_HLD 1 2 2 3 4 5 2
Security enforcing high-level
design
ADV_IMP 1 2 3 3 2 Implementation of the TSF
ADV_INT 1 2 3
ADV_LLD 1 1 2 2 1 Descriptive low-level design
ADV_RCR 1 1 1 1 2 2 3 1
Informal correspondence
demonstration
ADV
Development
ADV_SPM 1 3 3 3 1
Informal TOE security policy
model
AGD_ADM 1 1 1 1 1 1 1 1 Administrator guidance
AGD
Guidance AGD_USR 1 1 1 1 1 1 1 1 User guidance
ALC_DVS 1 1 1 2 2 2
Sufficiency of security
measures
ALC_FLR
ALC_LCD 1 2 2 3 1
Developer defined life-cycle
model
ALC
Life-cycle
support
ALC_TAT 1 2 3 3 1
Well-defined development
tools
ATE_COV 1 2 2 2 3 3 2 Analysis of coverage
ATE_DPT 1 1 2 2 3 1 Testing: high-level design
ATE_FUN 1 1 1 1 2 2 1 Functional testing
ATE
Tests
ATE_IND 1 2 2 2 2 2 3 2 Independent testing – sample
AVA_CCA 1 2 2
AVA_MSU 1 2 2 3 3 3
Analysis and testing of
insecure states
AVA_SOF 1 1 1 1 1 1 1
Strength of TOE security
function evaluation
AVA
Vulnerability
assessment
AVA_VLA 1 1 2 3 4 4 4 Highly resistant
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 14 out 16 CER/F/07.5
Annex 2. Evaluated product references
[ST] Reference security target for the evaluation:
- Torro Security Target,
Reference: Torro_ST_V1.5_29Jan08
Atmel Secure Microcontroller Solutions
For the needs of publication, the following security target has been
provided and validated in the evaluation:
- AT90SC256144RCFT Security Target Lite,
Reference: TPG0167A_06Mar08
Atmel Secure Microcontroller Solutions
[ETR] Evaluation technical report :
- TORRO project - Evaluation Technical Report -
AT90SC256144RCFT,
Reference: TORRO_ETR_v1.0
Serma Technologies
For the needs of composite evaluation with this microcontroller a
technical report for composition has been validated:
- Evaluation Technical Report Lite - TORRO project,
Référence : TORRO_ETR_Lite_V1.0
Serma Technologies
[CONF] The configuration list is:
- Torro_Design Configuration List,
Reference: Torro_DCL_V1.2_11Sep 07
Atmel Secure Microcontroller Solutions
- Torro Manufacturing Configuration List,
Reference: Torro_MCL_V1.1_10Jul07
Atmel Secure Microcontroller Solutions
- Torro Pattern and Mask list,
Reference: Torro_PML_V1.0_04Jul07
Atmel Secure Microcontroller Solutions
- Torro Deliverables list,
Reference: Torro_EDL_V2.8_19Feb08
Atmel Secure Microcontroller Solutions
[GUIDES] Guidance of the product:
- AT90SC CC AGD Interface,
Reference: AT90SC_GUID_V1.5_19Jul07
Atmel Secure Microcontroller Solutions
- AT90SC256144RCFT Technical Datasheet,
Reference: TPR0232BX--02May2007
- AT90SC Addressing Modes and Instruction Set,
Reference: 1323C-03May04
Atmel Secure Microcontroller Solutions
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E Certification report DCSSI-2008/10
Page 15 out 16
- Using the supervisor and user modes on the AT90SC ASL4
products,
Reference: TPR0095BX_07Jun07
Atmel Secure Microcontroller Solutions
- Security Recommendations for AT90SC ASL4 Products,
Reference: TPR0066H_31Jan08
Atmel Secure Microcontroller Solutions
- Secure Hardware DES and Triple DES on AT90SC ASL4
Products,
Reference: TPR0063IX_05Dec07
Atmel Secure Microcontroller Solutions
- Generating unpredictable random numbers on the AT90SC
family devices,
Reference: 1573CX_SMIC_21mar03
Atmel Secure Microcontroller Solutions
- Generation of Random Numbers with a Controlled Entropy on
AT90SC,
Reference: TPR0166BX_27Jun06
Atmel Secure Microcontroller Solutions
- Efficient use of AdvX for Implementing Cryptographic
Operations,
Reference: TPR0142CX_14Jun05
Atmel Secure Microcontroller Solutions
- AdvX™ for AT90SC Family Datasheet,
Reference: TPR0116CX_13Dec06
Atmel Secure Microcontroller Solutions
- Wafer Saw Recommendations,
Reference: TPG0079A_13Jun05
Atmel Secure Microcontroller Solutions
[PP0002] Protection Profile, Smart card IC Platform Protection Profile Version
1.0 July 2001. Certified by BSI (Bundesamt für Sicherheit in der
Informationstechnik) under the reference BSI-PP-0002-2001.
Certification report DCSSI-2008/10
ATMEL Secure Microcontroller AT90SC256144RCFT /
AT90SC25672RCFT rev. E
Page 16 out 16 CER/F/07.5
Annex 3. Certification references
Decree number 2002-535 dated 18th
April 2002 related to the security evaluations and
certifications for information technology products and systems.
[CER/P/01] Procedure CER/P/01 - Certification of the security provided by IT
products and systems, DCSSI.
[CC] Common Criteria for Information Technology Security Evaluation:
Part 1: Introduction and general model,
August 2005, version 2.3, ref CCMB-2005-08-001;
Part 2: Security functional requirements,
August 2005, version 2.3, ref CCMB-2005-08-002;
Part 3: Security assurance requirements,
August 2005, version 2.3, ref CCMB-2005-08-003.
The content of Common Criteria version 2.3 is identical to the
international ISO/IEC 15408:2005.
[CEM] Common Methodology for Information Technology Security
Evaluation: Evaluation Methodology,
August 2005, version 2.3, ref CCMB-2005-08-004.
The content of CEM version 2.3 is identical to the international ISO/IEC
18045:2005.
[CC IC] Common Criteria Supporting Document - Mandatory Technical
Document - The Application of CC to Integrated Circuits, reference
CCDB-2006-04-003 version 2.0, revision 1, April 2006.
[CC AP] Common Criteria Supporting Document - Mandatory Technical
Document - Application of attack potential to smart-cards, reference
CCDB-2007-04-001 version 2.3, revision 1, April 2007.
[CC RA] Arrangement on the Recognition of Common criteria certificates in the
field of information Technology Security, May 2000.
[SOG-IS] «Mutual Recognition Agreement of Information Technology Security
Evaluation Certificates», version 2.0, April 1999, Management
Committee of Agreement Group.
[REF-CRY] Cryptographic mechanisms - Rules and recommendations about the
choice and parameters sizes of cryptographic mechanisms with standard
robustness level version 1.10, 14th
of September 2007, No.
1904/SGDN/DCSSI/SDS/LCR
[AIS 34] Application Notes and Interpretation of the Scheme - Evaluation
Methodology for CC Assurance Classes for EAL5+, AIS34, Version
1.00, 01 June 2004, Bundesamt für Sicherheit in der
Informationstechnik