ETSI TS 133 180 V14.8.0 (2020-01)

ETSI TS 133 180 V14.8.0 (2020-01)






TECHNICAL SPECIFICATION
LTE;
Security of the mission critical service
(3GPP TS 33.180 version 14.8.0 Release 14)

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3GPP TS 33.180 version 14.8.0 Release 14 1 ETSI TS 133 180 V14.8.0 (2020-01)



Reference
RTS/TSGS-0333180ve80
Keywords
LTE,SECURITY
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3GPP TS 33.180 version 14.8.0 Release 14 2 ETSI TS 133 180 V14.8.0 (2020-01)
Intellectual 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-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
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"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 33.180 version 14.8.0 Release 14 3 ETSI TS 133 180 V14.8.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 9
1 Scope . 10
2 References . 10
3 Definitions and abbreviations . 12
3.1 Definitions . 12
3.2 Abbreviations . 13
4 Overview of Mission Critical Security . 13
4.1 General . 13
4.2 Signalling plane security architecture. 14
4.3 MC system security architecture . 14
4.3.1 General . 14
4.3.2 User authentication and authorisation . 15
4.3.3 Identity keying of users and services . 16
4.3.4 Protection of application plane signalling . 16
4.3.5 Media security . 17
4.3.5.1 General . 17
4.3.5.2 Media security for group communications. . 17
4.3.5.3 Media security for private calls . 19
5 Common mission critical security framework . 20
5.1 User authentication and authorization . 20
5.1.1 General . 20
5.1.2 User authentication . 21
5.1.2.1 Identity management functional model . 21
5.1.2.2 User authentication framework . 22
5.1.2.3 OpenID Connect (OIDC) . 23
5.1.2.3.1 General . 23
5.1.2.3.2 User authentication example using username/password . 24
5.1.3 MCX user service authorisation. 24
5.1.3.1 General . 24
5.1.3.2 MCX user service authorization with MCX Server . 27
5.1.3.2.1 General . 27
5.1.3.2.2 Using SIP REGISTER . 27
5.1.3.2.3 Using SIP PUBLISH . 28
5.1.4 Inter-domain MCX user service authorization . 28
5.1.4.1 General . 28
5.1.4.2 Inter-domain identity management functional model . 28
5.2 Key management common elements . 30
5.2.1 Overview of key management . 30
5.2.2 Common key distribution . 31
5.2.3 Key distribution with end-point diversity . 32
5.2.4 Key distribution with associated parameters . 35
5.2.5 Key distribution with SAKKE-to-self payload . 36
5.2.6 Key distribution with identity hiding . 37
5.2.7 Key distribution across multiple security domains . 38
5.2.7.1 General . 38
5.2.7.2 Identification of External Security Domains . 38
5.2.7.3 Using multiple security domains . 39
5.3 User key management . 39
5.3.1 General . 39
5.3.2 Functional model for key management . 39
ETSI

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3GPP TS 33.180 version 14.8.0 Release 14 4 ETSI TS 133 180 V14.8.0 (2020-01)
5.3.3 Security procedures for key management . 40
5.3.4 Provisioned key material to support end-to-end communication security . 42
5.3.5 KMS Certificate . 42
5.3.6 KMS provisioned Key Set . 42
5.4 Key management from MC client to MC server (CSK upload) . 43
5.5 Key management between MCX servers (SPK) . 43
5.6 Key management for one-to-one (private) communications (PCK) . 43
5.7 Key management for group communications (GMK) . 44
5.7.1 General . 44
5.7.2 Security procedures for GMK provisioning . 44
5.7.3 Group member GMK management . 45
5.8 Key management from MC server to MC client (Key download) . 46
5.8.1 General . 46
5.8.2 ‘Key download' procedure . 46
5.9 Key management during MBMS bearer announcement . 47
5.10 UE key storage and key persistence . 47
5.10.1 Key storage . 47
5.10.2 Key persistence . 47
6 Supporting security mechanisms . 48
6.1 HTTP . 48
6.1.1 Authentication for HTTP-1 interface . 48
6.1.2 HTTP-1 interface security . 48
6.2 SIP . 48
6.2.1 Authentication for SIP core access . 48
6.2.2 SIP-1 interface security . 48
6.3 Network domain security . 49
6.3.1 LTE access authentication and security . 49
6.3.2 Inter/Intra domain interface security . 49
7 MCPTT and MCVideo . 49
7.1 General . 49
7.2 Private communications . 49
7.2.1 Key management . 49
7.2.2 Security procedures (on-network) . 49
7.2.3 Security procedures (off-network) . 51
7.2.4 First-to-answer security and key management . 52
7.2.4.1 Overview . 52
7.2.4.2 First-to-answer request and response . 53
7.2.4.3 First-to-answer call setup with security. 53
7.2.4.4 First-to-answer media protection . 55
7.2.5 Ambient listening call . 55
7.2.6 Ambient viewing call . 55
7.2.7 Private video pull . 56
7.2.7.1 One-to-one video pull . 56
7.2.7.2 One-from-server video pull . 56
7.2.8 Private video push . 57
7.2.8.1 One-to-one video push . 57
7.2.8.2 One-to-server video push . 57
7.2.8.3 Remotely initiated video push . 58
7.3 Group communications . 59
7.3.1 General . 59
7.3.2 Group creation security procedure . 60
7.3.3 Dynamic group keying . 60
7.3.3.1 General . 60
7.3.3.2 Group regrouping security procedure (within a single MC domain) . 60
7.3.3.3 Group regrouping security procedure (involving multiple MC domains) . 60
7.3.4 Broadcast group call . 62
7.3.5 Group-broadcast group call. 62
7.3.6 Emergency group call . 62
7.3.7 Imminent peril group call . 63
7.3.8 Emergency Alert . 63
ETSI

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3GPP TS 33.180 version 14.8.0 Release 14 5 ETSI TS 133 180 V14.8.0 (2020-01)
7.3.9 Remotely initiated video push to group . 63
7.4 Key derivation for media . 65
7.4.1 Derivation of SRTP master keys for private call . 65
7.4.2 Derivation of SRTP master keys for group media . 65
7.5 Media protection profile . 66
7.5.1 General . 66
7.5.2 Security procedures for media stream protection. 67
8 MCData . 69
8.1 Overview . 69
8.2 Key Management . 70
8.3 One-to-one communications . 71
8.4 Group communications . 71
8.5 MCData payload protection . 72
8.5.1 General . 72
8.5.2 Prequisites . 72
8.5.2.1 Prequisites for protected payloads . 72
8.5.2.2 Prequisites for authenticated payloads . 72
8.5.3 Key derivation for protected payloads . 72
8.5.4 Payload protection . 73
8.5.4.1 Format of protected payloads . 73
8.5.4.2 Encryption of protected payloads . 73
8.5.5 Payload authentication . 74
9 Signalling protection . 74
9.1 General . 74
9.2 Key distribution for signalling protection . 75
9.2.1 Client-Server Key (CSK) . 75
9.2.1.1 General . 75
9.2.1.2 Creation of the CSK . 75
9.2.1.3 Initial 'CSK Upload' Procedure . 75
9.2.1.4 CSK update via 'key download'. 76
9.2.2 Multicast Signalling Key (MuSiK) . 76
9.2.3 Signalling Protection Key (SPK) . 77
9.3 Application signalling security (XML protection) . 78
9.3.1 General . 78
9.3.2 Protected content . 78
9.3.3 Key agreement . 79
9.3.4 Confidentiality protection using XML encryption (xmlenc) . 79
9.3.4.1 General . 79
9.3.4.2 XML content encryption . 79
9.3.4.3 XML URI attribute encryption . 80
9.3.5 Integrity protection using XML signature (xmlsig) . 81
9.4 RTCP signalling protection (SRTCP) . 82
9.4.1 General . 82
9.4.2 Unicast RTCP protection between client and server . 82
9.4.3 Multicast RTCP protection between client and server . 83
9.4.4 Offline floor and transmission control protection .
...