Protection profiles for secure signature creation device - Part 5: Device with key generation and trusted communication with signature-creation application

EN 419211-5 specifies a protection profile for a secure signature creation device that may generate signing keys internally and communicate with the signature creation application in protected manner: secure signature creation device with key generation and trusted communication with signature creation application (SSCD KG TCSCA).

Schutzprofile für Sichere Signaturerstellungseinheiten - Teil 5: Erweiterung für Einheiten mit Schlüsselgenerierung und vertrauenswürdigem Kanal zur Signatur von Generierungsanwendungen

Diese Europäische Norm legt ein Schutzprofil für eine sichere Signaturerstellungseinheit fest, die Signatur-schlüssel intern erzeugen und den öffentlichen Schlüssel in geschützter Weise exportieren kann: Sichere Signaturerstellungseinheit mit Schlüsselerzeugung und vertrauenswürdigem Kanal zur Zertifikaterzeugungs-anwendung.

Profils de protection pour dispositif sécurisé de création électronique - Partie 5: Extension pour un dispositif avec génération de clé et communication sécurisée avec l'application de création de signature

La présente Norme européenne spécifie un profil de protection des dispositifs sécurisés de création de signature pouvant générer de manière interne des clés de signature et communiquer avec l'application de création de signature d'une manière protégée : Dispositif sécurisé de création de signature électronique avec génération de clé et communication sécurisée avec l'application de génération de signature (SSCD KG TCSCA).

Profil zaščite sredstva za varno elektronsko podpisovanje - 5. del: Sredstvo, ki generira ključ in zaupno komunicira prek aplikacije s podpisovanjem

General Information

Status
Published
Public Enquiry End Date
31-Oct-2010
Publication Date
07-Jan-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-Dec-2013
Due Date
16-Feb-2014
Completion Date
08-Jan-2014

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HPSchutzprofile für Sichere Signaturerstellungseinheiten - Teil 5: Erweiterung für Einheiten mit Schlüsselgenerierung und vertrauenswürdigem Kanal zur Signatur von GenerierungsanwendungenProfils de protection pour dispositif sécurisé de création électronique - Partie 5: Extension pour un dispositif avec génération de clé et communication sécurisée avec l'application de création de signatureProtection profiles for secure signature creation device - Part 5: Device with key generation and trusted communication with signature-creation application35.100.05UHãLWYHMultilayer applications35.040Nabori znakov in kodiranje informacijCharacter sets and information coding03.160Pravo. UpravaLaw. AdministrationICS:Ta slovenski standard je istoveten z:EN 419211-5:2013SIST EN 419211-5:2014en,de01-marec-2014SIST EN 419211-5:2014SLOVENSKI

STANDARD
SIST EN 419211-5:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 419211-5

December 2013 ICS 03.160; 35.040; 35.240.15 Supersedes CWA 14169:2004English Version

Protection profiles for secure signature creation device - Part 5: Extension for device with key generation and trusted channel to signature creation application

Profils de protection pour dispositif sécurisé de création de signature - Partie 5: Extension pour un dispositif avec génération de clé et communication sécurisée avec l'application de création de signature

Schutzprofile für Sichere Signaturerstellungseinheiten - Teil 5: Erweiterung für Einheiten mit Schlüsselerzeugung und vertrauenswürdigem Kanal zur Signaturerstellungsanwendung This European Standard was approved by CEN on 12 October 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 419211-5:2013 ESIST EN 419211-5:2014

EN 419211-5:2013 (E)
Contents

Page Foreword ...................................................................................................................................................... 3 Introduction ................................................................................................................................................. 4 1 Scope .............................................................................................................................................. 5 2 Normative references .................................................................................................................... 5 3 Conventions and terminology ...................................................................................................... 5 3.1 Conventions ................................................................................................................................... 5 3.2 Terms and definitions .................................................................................................................... 5 4 PP introduction .............................................................................................................................. 5 4.1 PP reference ................................................................................................................................... 5 4.2 PP overview .................................................................................................................................... 6 4.3 TOE overview ................................................................................................................................. 6 5 Conformance claims ...................................................................................................................... 8 5.1 CC conformance claim .................................................................................................................. 8 5.2 PP claim, Package claim ............................................................................................................... 8 5.3 Conformance rationale .................................................................................................................. 8 5.4 Conformance statement ................................................................................................................ 9 6 Security problem definition .......................................................................................................... 9 6.1 Assets, users and threat agents ................................................................................................... 9 6.2 Threats .......................................................................................................................................... 10 6.3 Organizational security policies ................................................................................................. 10 6.4 Assumptions ................................................................................................................................ 10 7 Security objectives ...................................................................................................................... 10 7.1 Security objectives for the TOE .................................................................................................. 10 7.2 Security objectives for the operational environment ............................................................... 11 7.3 Security objectives rationale ...................................................................................................... 12 8 Extended components definition ............................................................................................... 14 9 Security requirements ................................................................................................................. 14 9.1 Security functional requirements ............................................................................................... 14 9.2 Security assurance requirements .............................................................................................. 18 9.3 Security requirements rationale ................................................................................................. 19 Bibliography .............................................................................................................................................. 24

SIST EN 419211-5:2014
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Foreword This document (EN 419211-5:2013) has been prepared by Technical Committee CEN/TC 224 “Personal identification, electronic signature and cards and their related systems and operations”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2014, and conflicting national standards shall be withdrawn at the latest by June 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes CWA 14169:2004. This series of European Standards, Protection profiles for secure signature creation device consists of the following parts: —

Part 1: Overview — Part 2: Device with key generation — Part 3: Device with key import — Part 4: Extension for device with key generation and trusted channel to certificate generation application — Part 5: Extension for device with key generation and trusted channel to signature creation application — Part 6: Extension for device with key import and trusted channel to signature creation application According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 419211-5:2014

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Introduction This series of European Standards specifies Common Criteria protection profiles for secure signature creation devices and is issued by the European Committee for Standardization, Information Society Standardization System (CEN/ISSS) as update of the Electronic Signatures (E-SIGN) CEN/ISSS workshop agreement (CWA) 14169:2004, Annex B and Annex C on the protection profile secure signature creation devices, “EAL 4+”. Preparation of this document as a protection profile (PP) follows the rules of the Common Criteria version 3.1 [2], [3] and [4]. SIST EN 419211-5:2014

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1 Scope This European Standard specifies a protection profile for a secure signature creation device that may generate signing keys internally and communicate with the signature creation application in protected manner: secure signature creation device with key generation and trusted communication with signature creation application (SSCD KG TCSCA). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. prEN 419211-1:2011, Protection profiles for secure signature creation device — Part 1: Overview1) 3 Conventions and terminology 3.1 Conventions This document is drafted in accordance with the CEN-CENELEC Internal Regulations Part 3 and content and structure of this document follow the rules and conventions laid out in Common Criteria 3.1. Normative aspects of content in this European Standard are specified according to the Common Criteria rules and not specifically identified by the verbs “shall” or “must”. 3.2 Terms and definitions For the purposes of this document, the acronyms, terms and definitions given in prEN 419211-1:2011 apply. 4 PP introduction 4.1 PP reference Title: Protection profiles for secure signature creation device — Part 5: Extension for device with key generation and trusted communication with signature creation application Version: 1.0.1 Author: CEN / CENELEC (TC224/WG17) Publication date: 2012–11–14 Registration: BSI-CC-PP-0072 CC version: 3.1 Revision 4 Editor: Arnold Abromeit, TÜV Informationstechnik GmbH General status: final Keywords: secure signature creation device, electronic signature, digital signature, key generation, trusted communication with signature creation application

1) To be published. This document was submitted to the Enquiry procedure under reference prEN 14169-1. SIST EN 419211-5:2014

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4.2 PP overview This Protection Profile is established by CEN as a European Standard for products to create electronic signatures. It fulfils requirements of Directive2) 1999/93/EC of the European Parliament and of the Council of 13 December 1999 on a community framework for electronic signatures. In accordance with Article 9 of this European Directive this standard can be indicated by the European Commission in the Official Journal of the European Communities as generally recognized standard for electronic signature products. This protection profile defines security functional requirements and security assurance requirements that comply with those defined in Annex III of the Directive for a secure signature creation device (SSCD). This secure signature creation device is the target of evaluation (TOE) for this protection profile. European Union Member States may presume that there is compliance with the requirements laid down in Annex III of the Directive when an electronic signature product is evaluated to a Security Target (ST) that is compliant with this Protection Profile (PP). This Protection Profile about secure signature creation device with key generation and trusted communication with signature creation application (PP SSCD KG TCSCA) includes the security requirements for SSCD with key generation generating signature creation data (SCD) and creating digital signature to be used for (qualified or advanced) electronic signatures as described in the core PP [5]. Additionally, the TOE of this PP supports a trusted communication with a signature creation application for protection of authentication data and data to be signed. These security features allow using the TOE in a more complex operational environment. It conforms to the core PP SSCD KG [5]. The implication of this conformance claim is explained in 5.3 hereinafter. The assurance level for this PP is EAL4 augmented with AVA_VAN.5. 4.3 TOE overview 4.3.1 Operation of the TOE This subclause presents a functional overview of the TOE in its distinct operational environments: — The preparation environment, where it interacts with a certification service provider through a certificate generation application (CGA) to obtain a certificate for the signature validation data (SVD) corresponding with the signature creation data (SCD) the TOE has generated. The initialization environment interacts further with the TOE to personalize it with the initial value of the reference authentication data (RAD). — The signing environment where it interacts with a signer through a signature creation application (SCA) to sign data after authenticating the signer as its signatory. The signature creation application provides the data to be signed (DTBS), or a unique representation thereof (DTBS/R) as input to the TOE signature creation function and obtains the resulting electronic signature3). The TOE and the SCA communicate through a trusted channel to ensure the integrity of the DTBS respective DTBS/R. — The management environments where it interacts with the user or an SSCD-provisioning service provider to perform management operations, e.g. for the signatory to reset a blocked RAD. A single device, e.g. a smart card terminal, may provide the required secure environment for management and signing.

2) This European Directive is referred to in this PP as “the Directive”. 3) At a pure functional level the SSCD creates an electronic signature; for an implementation of the SSCD, in that meeting the requirements of this PP and with the key certificate generated as specified in the Directive, Annex I, the result of the signing process can be used as to create a qualified electronic signature. SIST EN 419211-5:2014

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The signing environment, the management environment and the preparation environment are secure and protect data exchanged with the TOE. Figure 5 in prEN 419211-1:2011 illustrates the operational environment. The TOE stores signature creation data and reference authentication data. The TOE may store multiple instances of SCD. In this case, the TOE provides a function to identify each SCD and the signature creation application (SCA) can provide an interface to the signer to select an SCD for use in the signature creation function of the SSCD. The TOE protects the confidentiality and integrity of the SCD and restricts its use in signature creation to its signatory. The electronic signature created with the TOE is a qualified electronic signature as defined in the Directive if the certificate for the SVD is a qualified certificate (Annex I). Determining the state of the certificate as qualified is beyond the scope of this standard. The SCA is assumed to protect the integrity of the input it provides to the TOE signature creation function as being consistent with the user data authorized for signing by the signatory. Unless implicitly known to the TOE, the SCA indicates the kind of the signing input (as DTBS/R) it provides and computes any hash values required. The TOE may augment the DTBS/R with signature parameters it stores and then computes a hash value over the input as needed by the kind of input and the used cryptographic algorithm. The TOE and the SCA communicate through a trusted channel in order to protect the integrity of the DTBS/R. The TOE stores signatory reference authentication data to authenticate a user as its signatory. The RAD is a password, e.g. PIN, a biometric template or a combination of these. The TOE protects the confidentiality and integrity of the RAD. The TOE may provide a user interface to directly receive verification authentication data (VAD) from the user, alternatively, the TOE receive the VAD from the signature creation application. If the signature creation application handles requesting obtaining a VAD from the user, it is assumed to protect the confidentiality and integrity of this data. A certification service provider and a SSCD-provisioning service provider interact with the TOE in the secure preparation environment to perform any preparation function of the TOE required before control of the TOE is given to the legitimate user. These functions may include: — initializing the RAD; — generating a key pair; — storing personal information of the legitimate user. A typical example of an SSCD is a smart card. In this case, a smart card terminal may be deployed that provides the required secure environment to handle a request for signatory authorization. A signature can be obtained on a document prepared by a signature creation application component running on personal computer connected to the card terminal. The signature creation application, after presenting the document to the user and after obtaining the authorization PIN initiates the electronic signature creation function of the smart card through the terminal. 4.3.2 Target of evaluation The TOE is a combination of hardware and software configured to securely create, use and manage signature creation data (SCD). The SSCD protects the SCD during its whole lifecycle as to be used in a signature creation process solely by its signatory. The TOE comprises all IT security functionality necessary to ensure the secrecy of the SCD and the security of the electronic signature. The TOE provides the following functions: a) to generate signature creation data (SCD) and the correspondent signature verification data (SVD); SIST EN 419211-5:2014

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b) to export the SVD for certification; c) to, optionally, receive and store certificate info; d) to switch the TOE from a non-operational state to an operational state; and e) if in an operational state, to create electronic signatures for data with the following steps: 1) select an SCD if multiple are present in the SSCD; 2) authenticate the signatory and determine its intent to sign; 3) receive data to be signed or a unique representation thereof (DTBS/R) through a trusted channel with SCA; 4) apply an appropriate cryptographic signature creation function using the selected SCD to the DTBS/R. The TOE may implement its function for electronic signature creation to also conform to the specifications in ETSI/TS 101 733 (CAdES) [7], ETSI/TS 101 903 (XAdES) [8] and ETSI/TS 101 903 (PAdES) [9]. 4.3.3 TOE lifecycle The TOE lifecycle is the same as defined in the PP SSCD KG [5], section 4.3.3. 5 Conformance claims 5.1 CC conformance claim This PP uses the Common Criteria version 3.1 Revision 4 (see Bibliography). This PP is conforming to Common Criteria Part 2 [3] extended. This PP is conforming to Common Criteria Part 3 [4]. 5.2 PP claim, Package claim This PP is strictly conforming to the core PP SSCD KG [5] version 2.0.1 as dated of 2012-01-23. This PP is conforming to assurance package EAL4 augmented with AVA_VAN.5 defined in CC Part 3 [4]. 5.3 Conformance rationale This PP SSCD KG TCSCA conforms to the core PP SSCD KG [5]. This implies for this PP: a) The TOE type of this PP SSCD KG TCSCA is the same as the TOE type of the core PP SSCD KG: the TOE is a combination of hardware and software configured to securely create, use and manage signature creation data. b) The security problem definition (SPD) of this PP SSCD KG TCSCA contains the security problem definition of the core PP SSCD KG. The SPD for the SSCD KG TCSCA is described by the same threats, organizational security policies and assumptions as for the TOE in core PP SSCD KG. SIST EN 419211-5:2014

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c) The security objectives for the TOE in this PP SSCD KG TCSCA include all the security objectives for the TOE of the core PP SSCD KG and add the security objective OT.TOE_TC_VAD_Imp (Trusted channel of TOE for VAD import) and OT.TOE_TC_DTBS_Imp (Trusted channel for DTBS). d) The security objectives for the operational environment in this PP SSCD KG TCSCA include all security objectives for the operational environment of the core PP SSCD KG except OE.HI_VAD and OE.DTBS_Protect. This PP adapts OE.HI_VAD and OE.DTBS_Protect to the support provided by the TOE by new security functionality (cf. OT.TOE_TC_VAD_Imp, OT.TOE_TC_DTBS_Imp) provided by the TOE and changes them into OE.HID_TC_VAD_Exp and OE.SCA_TC_DTBS_Exp (cf. 7.2 for details). e) The SFRs specified in this PP SSCD KG TCSCA includes all security functional requirements (SFRs) specified in the core PP SSCD KG. Additional SFRs address trusted channel between the TOE and the SCA: FDP_UIT.1/DTBS, FTP_ITC.1/VAD and FTP_ITC.1/DTBS. f) This PP SSCD KG TCSCA does not provide completion of all operations left to the ST writer in the core PP SSCD KG. This PP provides refinements for the SFR FIA_UAU.1 of the core PP. g) The SARs specified in this PP SSCD KG TCSCA includes all SAR as specified in the core PP SSCD KG. It does not include additional SAR not included in the core PP SSCD KG. Further information about the relation of this PP and the core PP are given in 6.2, 6.3, 6.4, 7.1.1 and 7.2.1. 5.4 Conformance statement This PP requires strict conformance of the ST or PP claiming conformance to this PP. 6 Security problem definition 6.1 Assets, users and threat agents The Common Criteria define assets as entities that the owner of the TOE presumably places value upon. The term “asset” is used to describe the threats in the operational environment of the TOE. The assets of this PP SSCD Type TCSCA are the same as of the core PP SSCD KG [7]. Assets and objects: a) SCD: private key used to perform an electronic signature operation. The confidentiality, integrity and signatory’s sole control over the use of the SCD shall be maintained. b) SVD: public key linked to the SCD and used to perform electronic signature verification. The integrity of the SVD when it is exported shall be maintained. c) DTBS and DTBS/R: set of data, or its representation, which the signatory intends to sign. Their integrity and the unforgeability of the link to the signatory provided by the electronic signature shall be maintained. Users and subjects acting for users: d) User: End user of the TOE who can be identified as administrator or signatory. The subject S.User may act as S.Admin in the role R.Admin or as S.Sigy in the role R.Sigy. e) Administrator: User who is in charge to perform the TOE initialization, TOE personalization or other TOE administrative functions. The subject S.Admin is acting in the role R.Admin for this user after successful authentication as administrator. SIST EN 419211-5:2014

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f) Signatory: User who hold the TOE and use it on their own behalf or on behalf of the natural or legal person or entity they represent. The subject S.Sigy is acting in the role R.Sigy for this user after successful authentication as signatory. Threat agents: g) Attacker: Human or process acting on their behalf located outside the TOE. The main goal of the attacker is to access the SCD or to falsify the electronic signature. The attacker has got a high attack potential and knows no secret. 6.2 Threats This PP includes all threats of the core PP SSCD KG [7]: T.SCD_Divulg, T.SCD_Derive, T.Hack_Phys, T.SVD_Forgery, T.SigF_Misuse, T.DTBS_Forgery and T.Sig_Forgery. This PP does not define any additional threats. 6.3 Organizational security policies This PP includes all organizational security policies of the core PP SSCD KG [7]: P.CSP_Qcert, P.Qsign, P.Sigy_SSCD and P.Sig_Non-Repud. This PP does not define any additional organizational security policies. 6.4 Assumptions This PP includes all assumptions of the core PP SSCD KG [5]: A.CGA and A.SCA. This PP does not define any additional assumptions about the operational environment. 7 Security objectives 7.1 Security objectives for the TOE 7.1.1 Relation to core PP SSCD KG This PP includes all security objectives for the TOE as defined in the core PP SSCD KG [7]: OT.Lifecycle_Security, OT.SCD/SVD_Gen, OT.SCD_Unique, OT.SCD_SVD_Corresp, OT.SCD_Secrecy, OT.Sig_Secure, OT.Sigy_SigF, OT.DTBS_Integrity_TOE, OT.EMSEC_Design, OT.Tamper_ID and OT.Tamper_Resistance. This PP describes the following additional security objectives for the TOE: 7.1.2 OT.TOE_TC_VAD_Imp Trusted channel of TOE for VAD import The TOE shall provide a trusted channel for the protection of the confidentiality and integrity of the VAD received from the HID as needed by the authentication method employed. Application note 1: This security objective for the TOE is partly covering OE.HID_VAD from the core PP. While OE.HID_VAD in the core PP requires only the operational environment to protect VAD, this PP requires the HID and the TOE to implement a trusted channel for the protection of the VAD: the HID exports the VAD and establishes one end of the trusted channel according to OE.HID_TC_VAD_Exp, the TOE imports VAD at the other end of the trusted channel according to OT.TOE_TC_VAD_Imp. Therefore this PP re-assigns partly SIST EN 419211-5:2014

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the VAD protection from the operational environment as described by OE.HID_VAD to the TOE as described by OT.TOE_TC_VAD_Imp and leaves only the necessary functionality by the HID. 7.1.3 OT.TOE_TC_DTBS_Imp Trusted channel of TOE for DTBS import The TOE shall provide a trusted channel to the SCA to detect alteration of the DTBS/R received from the SCA. The TOE shall not generate electronic signatures with the SCD for altered DTBS. Application note 2: This security objective for the TOE is partly covering OE.DTBS_Protect from the core PP. While OE.DTBS_Protect in the core PP requires only the operational environment to protect DTBS, this PP requires the SCA and the TOE to implement a trusted channel for the protection of the DTBS: the SCA exports the DTBS and establishes one end of the trusted channel according to OE.SCA_TC_DTBS_Exp, the TOE imports DTBS at the other end of the trusted channel according to OT.TOE_TC_DTBS_Imp. Therefore this PP re-assigns partly the DTBS protection from the operational environment as described by OE.DTBS_Protect to the TOE as described by OT.TOE_TC_DTBS_Imp and leaves only the necessary functionality by the SCA. 7.2 Security objectives for the operational environment 7.2.1 Relation to core PP This PP includes the security objectives for the operational environment as defined in the core PP SSCD KG [5]: OE.SVD_Auth, OE.CGA_Qcert, OE.SSCD_Prov_Service, OE.DTBS_Intend and OE.Signatory. This PP substitutes OE.HI_VAD from the core PP by OE.HID_TC_VAD_Exp and OE.DTBS_Protect from the core PP by OE.SCA_TC_DTBS_Exp as follows: 7.2.2 OE.HID_TC_VAD_Exp

Trusted channel of HID for VAD export The HID provides the human interface for user authentication. The HID will ensure confidentiality and integrity of the VAD as needed by the authentication method employed including export to the TOE by means of a trusted channel. Application note 3: This security objective for the TOE is partly covering OE.HID_VAD from the core PP. While OE.HID_VAD in the core PP requires only the operational environment to protect VAD, this PP requires the HID and the TOE to implement a trusted channel for the protection of the VAD: the HID exports the VAD and establishes one end of the trusted channel according to OE.HID_TC_VAD_Exp, the TOE imports VAD at the other end of the trusted channel according to OT.TOE_TC_VAD_Imp. Therefore this PP re-assigns partly the VAD protection from the operational environment as described by OE.HID_VAD to the TOE as described by OT.TOE_TC_VAD_Imp and leaves only the necessary functionality by the HID. 7.2.3 OE.SCA_TC_DTBS_Exp Trusted channel of SCA for DTBS export The SCA provides a trusted channel to the TOE for the protection of the integrity of the DTBS to ensure that the DTBS/R cannot be altered undetected in transit between the SCA and the TOE. Application note 4: This security objective for the TOE is partly covering OE.DTBS_Protect from the core PP. While OE.DTBS_Protect in the core PP

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