TÜV Rheinland Nederland B.V.
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Version
2020-2
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Certification Report
STSafe S300 v1.2.5
Sponsor and developer: ST Microelectronics S.r.l.
Zona Industriale Marcianise SUD
81025 Marcianise (CE)
Italy
Evaluation facility: Brightsight
Brassersplein 2
2612 CT Delft
The Netherlands
Report number: NSCIB-CC-0176780-CR
Report version: 1
Project number: 0176780
Author(s): Wouter Slegers
Date: 20 August 2020
Number of pages: 11
Number of appendices: 0
Reproduction of this report is authorized provided the report is reproduced in its entirety.
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CONTENTS:
Foreword 3
Recognition of the certificate 4
International recognition 4
European recognition 4
1 Executive Summary 5
2 Certification Results 6
2.1 Identification of Target of Evaluation 6
2.2 Security Policy 6
2.3 Assumptions and Clarification of Scope 6
2.4 Architectural Information 6
2.5 Documentation 7
2.6 IT Product Testing 7
2.7 Re-used evaluation results 8
2.8 Evaluated Configuration 8
2.9 Results of the Evaluation 8
2.10 Comments/Recommendations 9
3 Security Target 10
4 Definitions 10
5 Bibliography 11
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Foreword
The Netherlands Scheme for Certification in the Area of IT Security (NSCIB) provides a third-party
evaluation and certification service for determining the trustworthiness of Information Technology (IT)
security products. Under this NSCIB, TÜV Rheinland Nederland B.V. has the task of issuing
certificates for IT security products, as well as for protection profiles and sites.
Part of the procedure is the technical examination (evaluation) of the product, protection profile or site
according to the Common Criteria assessment guidelines published by the NSCIB. Evaluations are
performed by an IT Security Evaluation Facility (ITSEF) under the oversight of the NSCIB Certification
Body, which is operated by TÜV Rheinland Nederland B.V. in cooperation with the Ministry of the
Interior and Kingdom Relations.
An ITSEF in the Netherlands is a commercial facility that has been licensed by TÜV Rheinland
Nederland B.V. to perform Common Criteria evaluations; a significant requirement for such a license is
accreditation to the requirements of ISO Standard 17025 “General requirements for the accreditation
of calibration and testing laboratories”.
By awarding a Common Criteria certificate, TÜV Rheinland Nederland B.V. asserts that the product or
site complies with the security requirements specified in the associated (site) security target, or that
the protection profile (PP) complies with the requirements for PP evaluation specified in the Common
Criteria for Information Security Evaluation. A (site) security target is a requirements specification
document that defines the scope of the evaluation activities.
The consumer should review the (site) security target or protection profile, in addition to this
certification report, in order to gain an understanding of any assumptions made during the evaluation,
the IT product's intended environment, its security requirements, and the level of confidence (i.e., the
evaluation assurance level) that the product or site satisfies the security requirements stated in the
(site) security target.
Reproduction of this report is authorized provided the report is reproduced in its entirety.
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Recognition of the certificate
Presence of the Common Criteria Recognition Arrangement and SOG-IS logos on the certificate
indicates that this certificate is issued in accordance with the provisions of the CCRA and the SOG-IS
agreement and will be recognised by the participating nations.
International recognition
The CCRA has been signed by the Netherlands in May 2000 and provides mutual recognition of
certificates based on the CC. Starting September 2014 the CCRA has been updated to provide mutual
recognition of certificates based on cPPs (exact use) or STs with evaluation assurance components
up to and including EAL2+ALC_FLR. The current list of signatory nations and approved certification
schemes can be found on: http://www.commoncriteriaportal.org.
European recognition
The European SOGIS-Mutual Recognition Agreement (SOGIS-MRA) version 3 effective from April
2010 provides mutual recognition of Common Criteria and ITSEC certificates at a basic evaluation
level for all products. A higher recognition level for evaluation levels beyond EAL4 (resp. E3-basic) is
provided for products related to specific technical domains. This agreement was initially signed by
Finland, France, Germany, The Netherlands, Norway, Spain, Sweden and the United Kingdom. Italy
joined the SOGIS-MRA in December 2010. The current list of signatory nations, approved certification
schemes and the list of technical domains for which the higher recognition applies can be found on:
http://www.sogisportal.eu.
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1 Executive Summary
This Certification Report states the outcome of the Common Criteria security evaluation of the STSafe
S300 v1.2.5. The developer of the STSafe S300 v1.2.5 is ST Microelectronics S.r.l. located in
Marcianise, Italy and they also act as the sponsor of the evaluation and certification. A Certification
Report is intended to assist prospective consumers when judging the suitability of the IT security
properties of the product for their particular requirements.
STSafe S300 is a Secure element product that offers secure storage capability over the Weaver and
SFA applications, intended to be used as a secure storage element by a mobile phone.
The TOE has been evaluated by Brightsight B.V. located in Delft, The Netherlands. The evaluation
was completed on 20 August 2020 with the approval of the ETR. The certification procedure has been
conducted in accordance with the provisions of the Netherlands Scheme for Certification in the Area of
IT Security [NSCIB].
The scope of the evaluation is defined by the security target [ST], which identifies assumptions made
during the evaluation, the intended environment for the STSafe S300 v1.2.5, the security
requirements, and the level of confidence (evaluation assurance level) at which the product is
intended to satisfy the security requirements. Consumers of the STSafe S300 v1.2.5 are advised to
verify that their own environment is consistent with the security target, and to give due consideration to
the comments, observations and recommendations in this certification report.
The results documented in the evaluation technical report [ETR]
1
for this product provides sufficient
evidence that the TOE meets the EAL4 augmented (EAL4+) assurance requirements for the evaluated
security functionality. This assurance level is augmented with ALC_DVS.2 (Sufficiency of security
measures) and AVA_VAN.5 (Advanced methodical vulnerability analysis).
The evaluation was conducted using the Common Methodology for Information Technology Security
Evaluation, Version 3.1 Revision 5 [CEM] for conformance to the Common Criteria for Information
Technology Security Evaluation, version 3.1 Revision 5 [CC].
TÜV Rheinland Nederland B.V., as the NSCIB Certification Body, declares that the evaluation meets
all the conditions for international recognition of Common Criteria Certificates and that the product will
be listed on the NSCIB Certified Products list. It should be noted that the certification results only apply
to the specific version of the product as evaluated.
1
The Evaluation Technical Report contains information proprietary to the developer and/or the
evaluator, and is not releasable for public review.
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2 Certification Results
2.1 Identification of Target of Evaluation
The Target of Evaluation (TOE) for this evaluation is the STSafe S300 v1.2.5 from ST Microelectronics
S.r.l. located in Marcianise, Italy.
The TOE is comprised of the following main components:
Name Version
Hardware ST33G1M2 (maskset K8H0A) Version F
Software Firmware Version A
Neslib library V6.3.4
Storekeeper V1.0.9
STSafe OS and weaver applet V1.2.5
To ensure secure usage a set of guidance documents is provided together with the STSafe S300
v1.2.5. Details can be found in section 2.5 of this report.
For a detailed and precise description of the TOE lifecycle refer to the [ST], chapter 4.
2.2 Security Policy
STSafe S300 is a Secure element product that offers secure storage capability over the Weaver and
SFA applications, intended to be used as a secure storage element by a mobile phone.
The TOE provides two different applications for accessing two separate secure memories. The SFA is
the default application; SFA application is operational only on logical channel 0, while Weaver
application is operational only on logical channel 1.
2.3 Assumptions and Clarification of Scope
2.3.1 Assumptions
The assumptions defined in the Security Target are not covered by the TOE itself. These aspects lead
to specific Security Objectives to be fulfilled by the TOE-Environment. Detailed information on these
security objectives that must be fulfilled by the TOE environment can be found in section 8.2 of the
[ST].
2.3.2 Clarification of scope
The evaluation did not reveal any threats to the TOE that are not countered by the evaluated security
functions of the product.
2.4 Architectural Information
The TOE is a Secure element product that offers secure storage capability over the Weaver and SFA
applications, intended to be used as a secure storage element by a mobile phone. The product offers
also an additional functionality called “Firmware Upgrade OS” that allows Operational OS firmware
update.
The TOE is a composition of a Java Card OS and the SFA and Weaver applications, with the
ST33G1M2 IC platform (including Neslib and Storekeeper).
The logical architecture of the TOE can be depicted as follows (from [ST]):
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Figure 1. Logical architecture of the TOE
2.5 Documentation
The following documentation is provided with the product by the developer to the customer:
Name Version Date
STSafe S300 – Preparative Procedure Rev C 17 June 2020
STSafe S300 - Operational User Guidance Rev D 17 June 2020
2.6 IT Product Testing
Testing (depth, coverage, functional tests, independent testing): The evaluators examined the
developer’s testing activities documentation and verified that the developer has met their testing
responsibilities.
2.6.1 Testing approach and depth
The developer has performed extensive testing on functional specification, subsystem and module
level. All parameter choices have been addressed at least once. All boundary cases identified have
been tested explicitly, and additionally the near-boundary conditions have been covered
probabilistically. The testing was largely automated using industry standard and proprietary test suites.
Test scripts were extensively used to verify that the functions return the expected values.
The underlying hardware and crypto-library test results are extendable to composite evaluations, as
the underlying platform is operated according to its guidance and the composite evaluation
requirements are met.
For the testing performed by the evaluators, the developer has provided samples and a test
environment. The evaluators have reproduced a selection of the developer tests, as well as a small
number of test cases designed by the evaluator.
2.6.2 Independent Penetration Testing
The methodical analysis performed was conducted along the following steps:
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 When evaluating the evidence in the classes ASE, ADV and AGD the evaluator considers whether
potential vulnerabilities can already be identified due to the TOE type and/or specified behaviour in
such an early stage of the evaluation.
 For ADV_IMP a thorough implementation representation review has performed on the TOE. During
this attack oriented analysis the protection of the TOE was analysed using the knowledge gained
from all previous evaluation classes. This results in the identification of (additional) potential
vulnerabilities. For this analysis has been performed according to the attack methods in the JIL
Application of Attack Potential. An important source for assurance in this step is the technical report
[HW-ETRfC] of the underlying platform.
 All potential vulnerabilities were analysed using the knowledge gained from all evaluation classes
and information from the public domain. A judgment was made on how to assure that these potential
vulnerabilities are not exploitable. The potential vulnerabilities were addressed by penetration
testing, a guidance update or in other ways that were deemed appropriate.
Two perturbation attacks and one side channel attack was performed, for a total of four weeks of
penetration testing.
2.6.3 Test Configuration
The TOE is available in one configuration only. All testing was performed on the TOE as defined in the
[ST].
2.6.4 Testing Results
The testing activities, including configurations, procedures, test cases, expected results and observed
results are summarised in the [ETR], with references to the documents containing the full details.
The developer’s tests and the independent functional tests produced the expected results, giving
assurance that the TOE behaves as specified in its [ST] and functional specification.
No exploitable vulnerabilities were found with the independent penetration tests.
The algorithmic security level of cryptographic functionality has not been rated in this certification
process, but the current consensus on the algorithmic security level in the open domain, i.e. from the
current best cryptanalytic attacks published, has been taken into account.
The algorithmic security level exceeds 100 bits for all evaluated cryptographic functionality as required
for high attack potential (AVA_VAN.5).
For composite evaluations, please consult the [ETRfC] for details.
2.7 Re-used evaluation results
There is no re-use of evaluation results in this certification.
Sites involved in the development and production of the hardware platform were re-used by
composition.
There has been extensive re-use of the ALC aspects for the sites involved in the development and
production of the software part of the TOE, by use of one Site Technical Audit Re-use report
approaches.
No sites has been visited as part of this evaluation.
2.8 Evaluated Configuration
The TOE is defined uniquely by its name and version number STSafe S300 v1.2.5.
2.9 Results of the Evaluation
The evaluation lab documented their evaluation results in the [ETR] which references an ASE
Intermediate Report and other evaluator documents. To support composite evaluations according to
[CCDB-2007-09-01] a derived document [ETRfC] was provided and approved. This document
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provides details of the TOE evaluation that have to be considered when this TOE is used as platform
in a composite evaluation.
The verdict of each claimed assurance requirement is “Pass”.
Based on the above evaluation results the evaluation lab concluded the STSafe S300 v1.2.5, to be CC
Part 2 conformant, CC Part 3 conformant, and to meet the requirements of EAL 4 augmented with
ALC_DVS.2 and AVA_VAN.5. This implies that the product satisfies the security requirements
specified in Security Target [ST].
2.10 Comments/Recommendations
The user guidance as outlined in section 2.5 contains necessary information about the usage of the
TOE.
In addition all aspects of assumptions, threats and policies as outlined in the Security Target not
covered by the TOE itself need to be fulfilled by the operational environment of the TOE.
The customer or user of the product shall consider the results of the certification within his system risk
management process. In order for the evolution of attack methods and techniques to be covered, he
should define the period of time until a re-assessment for the TOE is required and thus requested from
the sponsor of the certificate.
The strength of the cryptographic algorithms and protocols was not rated in the course of this
evaluation. This specifically applies to the following proprietary or non-standard algorithms, protocols
and implementations: weaver protocol.
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3 Security Target
The STSafe S300 Security Target, Rev. F, 31 July 2020 [ST] is included here by reference.
Please note that for the need of publication a public version [ST-lite] has been created and verified
according to [ST-SAN].
4 Definitions
This list of Acronyms and the glossary of terms contains elements that are not already defined by the
CC or CEM:
IT Information Technology
ITSEF IT Security Evaluation Facility
JIL Joint Interpretation Library
NSCIB Netherlands Scheme for Certification in the area of IT security
PP Protection Profile
TOE Target of Evaluation
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5 Bibliography
This section lists all referenced documentation used as source material in the compilation of this
report:
[CC] Common Criteria for Information Technology Security Evaluation, Parts I, II and III,
Version 3.1 Revision 5, April 2017.
[CEM] Common Methodology for Information Technology Security Evaluation, Version 3.1
Revision 5, April 2017.
[ETR] Evaluation Technical Report STSafe S300 v1.2.5, 20-RPT-640, Version 4.0, Issue
17 August 2020.
[ETRfC] ETR for Composite Evaluation STSafe S300 v1.2.5, 20-RPT-703, Version 3.0,
Issue 17 August 2020.
[HW-CERT] Rapport de certification ANSSI-CC-2020/22 ST33G1M2 C01 including optional
cryptographic library NesLib and optional technology MIFARE4Mobile, v29.2
[HW-ETRfC] Evaluation Technical Report for composite evaluation – Project: ASTIM /
ST33G1M2 C01 – Reference ASTIM_ETRLite, v6.0
[HW-ST] ST33G1M2 C01 – Security target for composition, Rev C01.3
[NSCIB] Netherlands Scheme for Certification in the Area of IT Security, Version 2.5, 28
March 2019.
[ST] STSafe S300 Security Target, Rev. F, 31 July 2020.
[ST-lite] STSafe S300 Securirty Target Lite, Rev. A, 31 July
[ST-SAN] ST sanitising for publication, CC Supporting Document CCDB-2006-04-004, April
2006.
(This is the end of this report).