TrustCB B.V.
Registered address:
Van den Berghlaan 48, 2132 AT
Hoofddorp, The Netherlands
nscib@trustcb.com
https://trustcb.com/common-criteria/nscib/
https://nscib.nl
TrustCB B.V. is a registered company at the
Netherlands Chamber of Commerce (KVK),
under number 858360275.
Version
2023-11
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Certification Report
nShield5s v13.5.1
Sponsor and developer: Entrust
One Station Square,
Cambridge, CB1 2GA,
United Kingdom
Evaluation facility: SGS Brightsight B.V.
Brassersplein 2
2612 CT Delft
The Netherlands
Report number: NSCIB-CC-2200057-01-CR
Report version: 3.0
Project number: NSCIB-2200057-01
Author(s): Wim Ton
Date: 8 May 2024
Number of pages: 13
Number of appendices: 0
Reproduction of this report is authorised only if 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 7
2.3.1 Assumptions 7
2.3.2 Clarification of scope 7
2.4 Architectural Information 7
2.5 Documentation 8
2.6 IT Product Testing 8
2.6.1 Testing approach and depth 8
2.6.2 Independent penetration testing 8
2.6.3 Test configuration 9
2.6.4 Test results 9
2.7 Evaluated Configuration 9
2.8 Evaluation Results 9
2.9 Comments/Recommendations 9
3 Security Target 11
4 Definitions 11
5 Bibliography 13
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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, TrustCB 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 TrustCB 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 TrustCB B.V. to
perform Common Criteria evaluations; a significant requirement for such a licence 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, TrustCB 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, 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 authorised only if the report is reproduced in its entirety.
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Recognition of the Certificate
Presence of the Common Criteria Recognition Arrangement (CCRA) and the SOG-IS logos on the
certificate indicates that this certificate is issued in accordance with the provisions of the CCRA and
the SOG-IS Mutual Recognition Agreement (SOG-IS MRA) and will be recognised by the participating
nations.
International recognition
The CCRA was signed by the Netherlands in May 2000 and provides mutual recognition of certificates
based on the Common Criteria (CC). Since 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.
For details of the current list of signatory nations and approved certification schemes, see
http://www.commoncriteriaportal.org.
European recognition
The SOG-IS MRA Version 3, effective since April 2010, provides mutual recognition in Europe of
Common Criteria and ITSEC certificates at a basic evaluation level for all products. A higher
recognition level for evaluation levels beyond EAL4 (respectively E3-basic) is provided for products
related to specific technical domains. This agreement was signed initially by Finland, France,
Germany, The Netherlands, Norway, Spain, Sweden and the United Kingdom. Italy joined the SOG-IS
MRA in December 2010.
For details of the current list of signatory nations, approved certification schemes and the list of
technical domains for which the higher recognition applies, see https://www.sogis.eu.
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1 Executive Summary
This Certification Report states the outcome of the Common Criteria security evaluation of the
nShield5s v13.5.1. The developer of the nShield5s v13.5.1 is Entrust located in Cambridge, United
Kingdom 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.
The TOE is a general-purpose Cryptographic Module (HSM) which comes in a PCI express board
form factor protected by a tamper resistant enclosure. It performs encryption, digital signing, and key
management on behalf of an extensive range of commercial and custom-built Client Applications
including public key infrastructures (PKIs), identity management systems, application-level encryption
and tokenization, and code signing.
The TOE has been evaluated by SGS Brightsight B.V. located in Delft, The Netherlands. The
evaluation was completed on 11 March 2024 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 nShield5s v13.5.1, 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 nShield5s v13.5.1 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 provide sufficient
evidence that the TOE meets the EAL4 augmented (EAL4+) assurance requirements for the
evaluated security functionality. This assurance level is augmented with ALC_FLR.2 (Flaw
remediation) 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] (Parts I, II and III).
TrustCB 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. Note that the certification results apply only to the specific version of the
product as evaluated.
The TOE is stated as a Qualified Signature Creation Device for the purposes of electronic
identification and trust services as detailed by the [EU-REG]. The evaluation by SGS Brightsight
included an examination of the TOE according to the eIDAS Dutch Conformity Assessment Process
Version 6 0.
TrustCB B.V., as the Dutch eIDAS-Designated Body responsible in The Netherlands for the
assessment of the conformity of qualified electronic signature and/or qualified electronic seal creation
devices declares that the evaluation meets the conditions for eIDAS certification for listing on the EU
eIDAS compiled list of Qualified Signature/Seal Creation Devices and Secure Signature Creation
Devices.
This document was reissued as version 2 on 18th of April 2024 to add the eIDAS assessment details.
This document was reissued as version 3 on 8th of May 2024 to correct the Bootloader version in
section 2.1 and the guidance documentation referenced in section 2.5.
1 The Evaluation Technical Report contains information proprietary to the developer and/or the
evaluator, and is not available 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 nShield5s v13.5.1 from Entrust located in
Cambridge, United Kingdom.
The TOE is comprised of the following main components:
Delivery
item type
Identifier Version
Hardware
nShield5s
NC5536E, PCB assembly part number
PCA10005-01 revision 03
nShield5c
NC5536N, PCB assembly part number
PCA10005-01 revision 03 in a NH2096
server
Software
Bootloader 1.4.1
nShield5s recovery image 13.5.0
nShield5s firmware image 13.5.1
The TOE can be a PCI card for integration by the user (nShield5s), or the same card is delivered pre-
integrated in a server (nShield5c).
To ensure secure usage, a set of guidance documents is provided, together with the nShield5s
v13.5.1. For details, see section 2.5 “Documentation” of this report.
2.2 Security Policy
Hardware Security Module
The following cryptographic primitives are supported and included within the TSF:
The TOE has the following features:
• Cryptographic functions, including digital signature, encryption/decryption, key agreement,
message digest, message authentication, key generation2.
o AES in ECB, CBC, GCM, CMAC, KW, and KWP mode with key lengths of 128, 192,
and 256 bits
o ECDSA, ECDH, and ECQMV with NIST and Brainpool curves
o RSA with OEAP, RSASSA-PKCS-v1_5, and RSASSA-PSS padding and modulus
lengths of 2048, 3072, and 4096 bits (plus 1024 bits only for signature verification)
o DSA with modulus lengths of 2048 and 3072 bits (plus 1024 bits only for signature
verification)
o Diffie Helman with modulus lengths from 2048 to 8192 bits
o KDF functions
o SHA-1, SHA-2, and SHA-3 hashes
o HMAC with SHA-1 and SHA-2 with a MAC length > 112 bits
.
• Random Number Generation compliant with AIS-31 and NIST SP 800-90A,
• Secure key management,
2 See [ST] chapter 1.3.3.1 for the details
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• Secure logging of audit records to an external server,
• Physical tamper resistance meeting ISO-19790 Level 3.
• Signed firmware updates.
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. For detailed information on the
security objectives that must be fulfilled by the TOE environment, see section 4.2 of the [ST].
2.3.2 Clarification of scope
Note that EN 419221-5 Protection Profile [EN419221-5] claims the environment for the TOE protects
against loss or theft of the TOE, deters and detects physical tampering, protects against attacks based
on emanations of the TOE, and protects against unauthorised software and configuration changes on
the TOE and the hardware appliance in which it is contained (“OE.Env Protected operating
environment”).
The ST follows the PP and also claims OE.Env, thus the environment in which the TOE is used must
ensure the above protection.
Any threats violating these objectives for the environment are not considered.
2.4 Architectural Information
The logical boundary of the TOE (indicated in blue in the picture below) comprises the firmware
located inside the PCIe board, with the exception of embedded CodeSafe applications and is
schematically represented by the following logical components.
The picture below includes also non-TOE components (such as Local Client Application, HW
appliance, external databases, syslog server and smartcard readers), which are functionally required
by the TOE, but do not enforce the security requirements listed in the Security Target [ST].
With nShield HSMs, keys never leave the physical HSM in an unprotected form.
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The TOE stores all user data externally in the “Security World”, secured with a user specific key. This
key can be retrieved from a quorum of smartcards in the “Operator Card Set”.
2.5 Documentation
The following documentation is provided with the product by the developer to the customer:
Identifier Version
nShield5 Common Criteria Evaluated Configuration Guide V29
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 evaluator repeated all automated developer tests and confirmed that these all pass.
The evaluator created additional test cases test to confirm verification of the version of the TOE, to
supplement coverage of SFRs, and to further exercise the behaviour of critical functionality.
2.6.2 Independent penetration testing
For the collection of possible vulnerabilities, a methodical approach is taken which consists of:
• Possible vulnerabilities found during the Design Assessment
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• Using applicable attack lists
• Public vulnerability search
The total test effort expended by the evaluators was 2 weeks (80 hours). During that test campaign,
100% of the total time was spent on logical tests.
2.6.3 Test configuration
Testing was conducted at the developer site, using the test equipment from the developer.
2.6.4 Test 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.
2.7 Evaluated Configuration
The TOE is defined uniquely by its name and version number nShield5s v13.5.1. Chapter 9.1.1 of the
installation guide describes how to read the version number and operational status of the TOE.
2.8 Evaluation Results
The evaluation lab documented their evaluation results in the [ETR], which references an ASE
Intermediate Report and other evaluator documents, and Site Technical Audit Reports for the
development [STAR-C] and for the manufacturing [STAR-P] 3 sites.
The verdict of each claimed assurance requirement is “Pass”.
Based on the above evaluation results the evaluation lab concluded the nShield5s v13.5.1, to be CC
Part 2 extended, CC Part 3 conformant, and to meet the requirements of EAL 4 augmented with
ALC_FLR.2 and AVA_VAN.5.This implies that the product satisfies the security requirements
specified in Security Target [ST].
The Security Target claims ’strict’ conformance to the Protection Profile [EN419221-5].
2.9 Comments/Recommendations
This is an updated certification report. After the certification, the [ST] was updated to show the correct
version 1.4.1 of the bootloader. The guidance was updated to remove the plaintext export function
which is not supported by the TOE. This version of the certification report refences the corrected
versions of these documents and the documents referring these.
The user guidance as outlined in section 2.5 “Documentation” contains necessary information about
the usage of the TOE. Certain aspects of the TOE’s security functionality, in particular the
countermeasures against attacks, depend on accurate conformance to the user guidance of both the
software and the hardware part of the TOE. There are no particular obligations or recommendations
for the user apart from following the user guidance. Please note that the documents contain relevant
details concerning the resistance against certain attacks.
3 The Site Technical Audit Report contains information necessary to an evaluation lab and
certification body for the reuse of the site audit report in a TOE evaluation.
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In addition, all aspects of assumptions, threats and policies as outlined in the Security Target not
covered by the TOE itself must 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. For the evolution of attack methods and techniques to be covered, the
customer 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 algorithms, protocols and implementations4:
• The algorithms in section 2.2 with shorter key-lengths, custom curves, and other modes.
• DES and 3DES
• Aria
• RC4
• Cast-256
• Camellia
• KTS-OAEP-basic
• KCDSA
• SEED
• X25519 key exchange
• Ed25519 public-key signature
• ElGamal
• ECKA-EG key agreement
• ECIES encryption/wrapping and decryption/unwrapping
• MD5, RIPEMD-160 and Tiger hashes
• EMV ARQC MAC
• 3GPP TUAK and Milenage
, which are out of scope as there are no security claims relating to these.
4 See chapter 1.3.3.2 of the [ST]
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3 Security Target
The nShield5 HSM Security Target, Version 115, 24 April 2024 [ST] is included here by reference.
4 Definitions
This list of acronyms and definitions contains elements that are not already defined by the CC or CEM:
ACL Access Control List
AES Advanced Encryption Standard
ACS Administrator Card Set - a set of smart cards used to control
access to Administration functions.
CBC Cipher Block Chaining (a block cipher mode of operation)
CBC-MAC Cipher Block Chaining Message Authentication Code
DES Data Encryption Standard
DCAP Dutch Conformity Assessment Process
ECB Electronic Code Book (a block-cipher mode of operation)
ECC Elliptic Curve Cryptography
ECDH Elliptic Curve Diffie-Hellman algorithm
ECDSA Elliptic Curve Digital Signature Algorithm
GCM Galois Counter Mode
IC Integrated Circuit
JIL Joint Interpretation Library
KDF Key Derivation Function
KW Key Wrap
LAN Local Area Network
MAC Message Authentication Code
MITM Man-in-the-Middle
NSCIB Netherlands Scheme for Certification in the area of IT Security
NSO nShield Security Officer
OCS Operator Card Set- a set of smart cards used to control access
to user functions.
PCO Platform Crypto Officer, the TOE administrator
PKI Public Key Infrastructure
PUK PIN Unblocking Key
QSCD Qualified Signature/Seal Creation Device
RNG Random Number Generator
RMI Remote Method Invocation
RSA Rivest-Shamir-Adleman Algorithm
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SCD Signature Creation Device
SDK System Development Kit
SHA Secure Hash Algorithm
SM Secure Messaging
SSH Secure Shell
SSL Secure Sockets Layer
TCP Transmission Control Protocol
TRNG True Random Number Generator
VLAN Virtual LAN
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5 Bibliography
This section lists all referenced documentation used as source material in the compilation of this
report.
[ASS-EIDAS] Assessment reporting sheet eIDAS, 24-RPT-144, Version 3.0, 2 May 2024
[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
[EN419221-5] EN 419 221-5:2018, Protection Profiles for TSP Cryptographic Modules – Part
5 Cryptographic Module for Trust Services, v1.0, registered under the reference
ANSSI-CC-PP-2016/05-M01, 18 May 2020
[ETR] Evaluation Technical Report | nShield5 Hardware Security Module v13.5.1 –
EAL4+, 23-RPT-699, Version 8.0,30 April 2024
[EU-REG] REGULATION (EU) No 910/2014 OF THE EUROPEAN PARLIAMENT AND
OF THE COUNCIL of 23 July 2014 on electronic identification and trust
services for electronic transactions in the internal market and repealing
Directive 1999/93/EC
[JIL-AAPHD] Application of Attack Potential to Hardware Devices with Security Boxes,
Version 3.0, July 2020
[JIL-AMHD] Attack Methods for Hardware Devices with Security Boxes, Version 3.0,
February 2020 (sensitive with controlled distribution)
[NSCIB] Netherlands Scheme for Certification in the Area of IT Security, Version 2.6,
02 August 2022
[ST] nShield5 HSM Security Target, Version 115, 24 April 2024
[STAR-C] Site Technical Audit Report Cambridge, 24-RPT-118, Version 4.0, 30 April
2024
[STAR-P] Site Technical Audit Report Plexus, 24-RPT-117, Version 4.0, 30 April 2024
(This is the end of this report.)