1、 ETSI TS 133 246 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); LTE; 3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS) (3GPP TS 33.246 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 133 246 V15.0.0 (2018-07)13GPP TS 33.246 version 15.0.0 Re
2、lease 15Reference RTS/TSGS-0333246vf00 Keywords LTE,SECURITY,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/8
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8、mbers. 3GPPTM and LTETMare trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 133 246 V15.0.0 (2018
9、-07)23GPP TS 33.246 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-mem
10、bers, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuan
11、t to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present docume
12、nt. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradena
13、me. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present docu
14、ment may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webap
15、p.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provis
16、ions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 133 246 V15.0.0 (2018-07)33GPP TS 33.246 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 7g3Introduction 7g31 Scop
17、e 8g32 References 8g33 Definitions, abbreviations, symbols and conventions 10g33.1 Definitions 10g33.2 Abbreviations . 10g33.3 Symbols 11g33.4 Conventions 11g34 MBMS security overview 11g34.1 MBMS security architecture. 11g34.1.1 General 11g34.1.2 BM-SC sub-functions . 13g34.1.3 UE security architec
18、ture 14g34.1A Granularity of MBMS security . 15g34.2 Key management overview 15g35 MBMS security functions 16g35.1 Authenticating and authorizing the user . 16g35.2 Key derivation, management and distribution 17g35.3 Protection of the transmitted traffic 17g36 Security mechanisms 18g36.1 Using GBA f
19、or MBMS 18g36.2 Authentication and authorisation of a user . 19g36.2.1 Authentication and authorisation in HTTP procedures . 19g36.2.1.1 General 19g36.2.1.2 Bootstrapping 19g36.2.1.3 HTTP digest authentication . 19g36.2.2 Authentication and authorisation in MBMS bearer establishment . 19g36.2.3 Void
20、 20g36.2.4 Void 20g36.3 Key management procedures . 20g36.3.1 General 20g36.3.2 MSK procedures . 20g36.3.2.1 MSK identification 20g36.3.2.1A MBMS User Service Registration procedure 21g36.3.2.1B MBMS User Service Deregistration procedure . 23g36.3.2.2 MSK request procedures . 25g36.3.2.2.1 Basic MSK
21、 request procedure . 25g36.3.2.2.2 Void . 26g36.3.2.2.3 Missed key update procedure 26g36.3.2.2.4 BM-SC solicited pull procedure 26g36.3.2.3 MSK delivery procedures . 27g36.3.2.3.1 Pushing the MSK to the UE 27g36.3.2.3.2 Void . 27g36.3.2.4 Handling of multiple status codes within one response messag
22、e 27g36.3.3 MTK procedures. 28g36.3.3.1 MTK identification 28g36.3.3.2 MTK update procedure . 28g36.3.3.2.1 MTK delivery in download . 28g3ETSI ETSI TS 133 246 V15.0.0 (2018-07)43GPP TS 33.246 version 15.0.0 Release 156.3.3.2.2 MTK delivery in streaming . 29g36.3.4 Multiple BM-SC deployments 29g36.3
23、.4.1 General 29g36.3.4.2 Service announcement coordination . 29g36.3.X.3 MSK key management anchor point . 29g36.3.4.4 MSK coordination . 29g36.3.4.5 MTK coordination . 29g36.3.4.6 MIKEY MTK timestamp coordination . 29g36.4 MIKEY message creation and processing in the ME . 30g36.4.1 General 30g36.4.
24、2 MIKEY common header . 30g36.4.3 Replay protection 31g36.4.4 General extension payload 31g36.4.5 MIKEY message structure 32g36.4.5.1 MSK message structure. 32g36.4.5.2 MSK Verification message structure 33g36.4.5.3 MTK message structure 34g36.4.6 Processing of received messages in the ME . 34g36.4.
25、6.1 MSK MIKEY Message Reception 34g36.4.6.2 MTK MIKEY Message Reception 35g36.5 Validation and key derivation functions in MGV-F . 35g36.5.1 General 35g36.5.2 Usage of MUK 35g36.5.3 MSK processing 35g36.5.4 MTK processing . 36g36.6 Protection of the transmitted traffic 37g36.6.1 General 37g36.6.2 Pr
26、otection of streaming data . 37g36.6.2.1 Usage of SRTP 37g36.6.2.1A Usage of SRTCP . 38g36.6.2.2 Packet processing in the UE 38g36.6.3 Protection of download data . 38g36.6.3.1 General 38g36.6.3.2 Usage of OMA DRM DCF . 39g36.7 Confidentiality protection of associated delivery procedures . 39g36.7.1
27、 General 39g36.7.2 TLS Profile . 40g36.7.3 HTTP server authentication 40g36.7.4 Authentication of the UE 40g3Annex A (informative): Trust model 41g3Annex B (informative): Security threats 42g3B.1 Threats associated with attacks on the radio interface . 42g3B.1.1 Unauthorised access to MBMS User Serv
28、ice data . 42g3B.1.2 Threats to integrity . 42g3B.1.3 Denial of service attacks . 42g3B.1.4 Unauthorised access to MBMS User Services . 42g3B.1.5 Privacy violation 43g3B.2 Threats associated with attacks on other parts of the system . 43g3B.2.1 Unauthorised access to data 43g3B.2.2 Threats to integr
29、ity . 43g3B.2.3 Denial of service . 43g3B.2.4 A malicious UE generating MTKs for malicious use later on 43g3B.2.5 Unauthorised insertion of MBMS user data and key management data . 43g3Annex C (normative): MBMS security requirements . 45g3C.1 Requirements on security service access 45g3C.1.1 Require
30、ments on secure service access 45g3C.1.2 Requirements on secure service provision . 45g3ETSI ETSI TS 133 246 V15.0.0 (2018-07)53GPP TS 33.246 version 15.0.0 Release 15C.2 Requirements on MBMS Transport Service signalling protection 45g3C.3 Requirements on Privacy 45g3C.4 Requirements on MBMS Key Man
31、agement 45g3C.5 Requirements on integrity protection of MBMS User Service data . 46g3C.6 Requirements on confidentiality protection of MBMS User Service data . 46g3C.7 Requirements on content provider to BM-SC reference point . 47g3Annex D (normative): UICC-ME interface . 48g3D.1 MSK Update Procedur
32、e 48g3D.2 Void 48g3D.3 MTK generation and validation . 48g3D.4 MSK deletion procedure 49g3D.5 MUK deletion procedure 49g3Annex E (Informative): MIKEY features not used in MBMS 50g3Annex F (normative): MRK key derivation for ME based MBMS key management . 51g3Annex G (normative): HTTP based key manag
33、ement messages . 52g3G.1 Introduction 52g3G.2 Key management procedures . 52g3G.2.1 MBMS User Service Registration 52g3G.2.2 MBMS User Service Deregistration . 53g3G.2.3 MSK request . 53g3G.2.4 Error situations . 54g3Annex H (informative): Signalling flows for MSK procedures 56g3H.1 Scope of signall
34、ing flows . 56g3H.2 Signalling flows demonstrating a successful MSK request procedure . 56g3H.2.1 Successful MSK request procedure 56g3Annex I (informative): Example of using MSKs and MTKs in MBMS . 60g3Annex J (informative): Mapping the MBMS security requirements into security functions and mechani
35、sm . 61g3J.1 Consistency check 61g3J.1.1 Requirements on secure service access . 61g3J.1.2 Requirements on MBMS transport Service signalling protection. 61g3J.1.3 Requirements on Privacy 62g3J.1.4 Requirements on MBMS Key Management . 62g3J.1.5 Requirements on integrity protection of MBMS User Servi
36、ce data . 63g3J.1.6 Requirements on confidentiality protection of MBMS User Service data 63g3J.1.7 Requirements on content provider to BM-SC reference point 64g3J.2 Conclusions 64g3Annex K (Informative): SRTP features not used in MBMS 65g3Annex L (Normative): Multicasting MBMS user data on Iub 66g3A
37、nnex M (informative): Relation to IMS based MBMS user services . 67g3Annex N (normative): GCSE security aspects . 68g3N.0 GCSE architecture and requirements . 68g3ETSI ETSI TS 133 246 V15.0.0 (2018-07)63GPP TS 33.246 version 15.0.0 Release 15N.1 GCSE security requirements 68g3N.1.1 General . 68g3N.1
38、.2 GCSE Broadcast Delivery specific security requirements . 68g3N.2 Security solution for MB2-C interface . 68g3N.3 Security solution for MB2-U interface . 69g3Annex O (normative): Security aspects of xMB reference point between Content Provider and BM-SC . 70g3O.1 General . 70g3O.2 Protection of th
39、e xMB reference point . 70g3Annex P (informative): Change history . 71g3History 76g3ETSI ETSI TS 133 246 V15.0.0 (2018-07)73GPP TS 33.246 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present docu
40、ment are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where:
41、 x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is inc
42、remented when editorial only changes have been incorporated in the document. Introduction The security of MBMS provides different challenges compared to the security of services delivered over point-to-point services. In addition to the normal threat of eavesdropping, there is also the threat that i
43、t may not be assumed that valid subscribers have any interest in maintaining the privacy and confidentiality of the communications, and they may therefore conspire to circumvent the security solution (for example one subscriber may publish the decryption keys enabling non-subscribers to view broadca
44、st content). Countering this threat requires the decryption keys to be updated frequently in a manner that may not be predicted by subscribers while making efficient use of the radio network. The stage 1 requirements for MBMS are specified in TS 22.146 2. ETSI ETSI TS 133 246 V15.0.0 (2018-07)83GPP
45、TS 33.246 version 15.0.0 Release 151 Scope The Technical Specification covers the security procedures of the Multimedia Broadcast/Multicast Service (MBMS) for 3GPP systems (UTRAN, GERAN and E-UTRAN). MBMS is a 3GPP system network bearer service over which many different applications could be carried
46、. The actual method of protection may vary depending on the type of MBMS application. 2 References The following documents contain provisions, which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edit
47、ion number, version number, etc.) or non-specific. - For a specific reference, subsequent revisions do not apply. - For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the la
48、test version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TS 22.146: “Multimedia Broadcast/Multicast Service; Stage 1“. 3 3GPP TS 23.246: “Multimedia Broadcast/Multicast Service (MBMS); Architecture and Functional Descri
49、ption“. 4 3GPP TS 33.102: “3G Security; Security Architecture“. 5 3GPP TS 22.246: “MBMS User Services“. 6 3GPP TS 33.220: “Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture“. 7 3GPP TS 31.102: “Characteristics of the USIM application“. 8 IETF RFC 2617 “HTTP Digest Authentication“. 9 IETF RFC 3830 “MIKEY: Multimedia Internet KEYing“ 10 IETF RFC 1982 “Serial Number Arithmetic“. 11 IETF RFC 3711 “Secure Real-time Transport Protocol“. 12 3GPP TS 43.020: “Security related network functions“. 13 3GPP TS 26.346: “Multimedia Broa
