LTE; Security of the mission critical service (3GPP TS 33.180 version 15.7.0 Release 15)

RTS/TSGS-0333180vf70

General Information

Status
Published
Publication Date
15-Jan-2020
Technical Committee
Current Stage
12 - Completion
Completion Date
16-Jan-2020
Ref Project

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ETSI TS 133 180 V15.7.0 (2020-01) - LTE; Security of the mission critical service (3GPP TS 33.180 version 15.7.0 Release 15)
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ETSI TS 133 180 V15.7.0 (2020-01)
TECHNICAL SPECIFICATION
LTE;
Security of the mission critical service
(3GPP TS 33.180 version 15.7.0 Release 15)
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3GPP TS 33.180 version 15.7.0 Release 15 1 ETSI TS 133 180 V15.7.0 (2020-01)
Reference
RTS/TSGS-0333180vf70
Keywords
LTE,SECURITY
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3GPP TS 33.180 version 15.7.0 Release 15 2 ETSI TS 133 180 V15.7.0 (2020-01)
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ETSI
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3GPP TS 33.180 version 15.7.0 Release 15 3 ETSI TS 133 180 V15.7.0 (2020-01)
Contents

Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 2

Modal verbs terminology .................................................................................................................................... 2

Foreword ........................................................................................................................................................... 12

1 Scope ...................................................................................................................................................... 13

2 References .............................................................................................................................................. 13

3 Definitions and abbreviations ................................................................................................................. 15

3.1 Definitions ........................................................................................................................................................ 15

3.2 Abbreviations ................................................................................................................................................... 16

4 Overview of Mission Critical Security ................................................................................................... 17

4.1 General ............................................................................................................................................................. 17

4.2 Signalling plane security architecture............................................................................................................... 17

4.3 MC system security architecture ...................................................................................................................... 18

4.3.1 General ........................................................................................................................................................ 18

4.3.2 User authentication and authorisation ......................................................................................................... 18

4.3.3 Identity keying of users and services .......................................................................................................... 19

4.3.4 Protection of application plane signalling ................................................................................................... 20

4.3.4.1 Application plane signalling security .................................................................................................... 20

4.3.4.2 Security enforcement at the network edge ............................................................................................ 21

4.3.5 Media security ............................................................................................................................................ 23

4.3.5.1 General .................................................................................................................................................. 23

4.3.5.2 Media security for group communications. ........................................................................................... 23

4.3.5.3 Media security for private calls ............................................................................................................. 24

5 Common mission critical security framework ....................................................................................... 26

5.1 User authentication and authorization .............................................................................................................. 26

5.1.1 General ........................................................................................................................................................ 26

5.1.2 User authentication ..................................................................................................................................... 27

5.1.2.1 Identity management functional model ................................................................................................. 27

5.1.2.2 User authentication framework ............................................................................................................. 28

5.1.2.3 OpenID Connect (OIDC) ...................................................................................................................... 29

5.1.2.3.1 General ............................................................................................................................................ 29

5.1.2.3.2 User authentication example using username/password .................................................................. 30

5.1.3 MCX user service authorisation.................................................................................................................. 30

5.1.3.1 General .................................................................................................................................................. 30

5.1.3.2 MCX user service authorization with MCX Server .............................................................................. 33

5.1.3.2.1 General ............................................................................................................................................ 33

5.1.3.2.2 Using SIP REGISTER ..................................................................................................................... 33

5.1.3.2.3 Using SIP PUBLISH ....................................................................................................................... 34

5.1.4 Inter-domain MC user service authorization .............................................................................................. 34

5.1.4.1 General .................................................................................................................................................. 34

5.1.4.2 Inter-domain identity management functional model ........................................................................... 34

5.1.5 MC user migration service authentication and authorisation ...................................................................... 36

5.2 Key management common elements ................................................................................................................ 38

5.2.1 Overview of key management .................................................................................................................... 38

5.2.2 Common key distribution ........................................................................................................................... 38

5.2.3 Key distribution with end-point diversity ................................................................................................... 40

5.2.4 Key distribution with associated parameters .............................................................................................. 42

5.2.5 Key distribution with SAKKE-to-self payload ........................................................................................... 43

5.2.6 Key distribution with identity hiding .......................................................................................................... 44

5.2.7 Key distribution across multiple security domains ..................................................................................... 45

5.2.7.1 General .................................................................................................................................................. 45

5.2.7.2 Identification of External Security Domains ......................................................................................... 45

5.2.7.3 Using multiple security domains ........................................................................................................... 46

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3GPP TS 33.180 version 15.7.0 Release 15 4 ETSI TS 133 180 V15.7.0 (2020-01)

5.2.8 KMS Redirect Responses (KRRs) .............................................................................................................. 46

5.2.8.1 Overview of KMS Redirect Response procedure (KRR) ...................................................................... 46

5.2.8.1.1 General ............................................................................................................................................ 46

5.2.8.1.2 KMSs and KMS URIs ..................................................................................................................... 47

5.2.8.2 Use of KRRs ......................................................................................................................................... 47

5.2.8.2.1 Content of KRRs ............................................................................................................................. 47

5.2.8.2.2 KRR creation procedure by a receiver ............................................................................................. 47

5.2.8.2.3 KRR creation procedure by a MCX server or signalling proxy ...................................................... 48

5.2.8.2.4 Processing a KRR at a MCX server or signalling proxy ................................................................. 48

5.2.8.2.5 KMS Selection at the initiator ......................................................................................................... 49

5.2.8.3 Security procedures for KMS Redirection Response ............................................................................ 50

5.2.8.4 Security Procedures for reporting external security domain use ........................................................... 52

5.2.8.5 Policy around use of external security domains .................................................................................... 52

5.3 User key management ...................................................................................................................................... 52

5.3.1 Key Management Server (KMS) ................................................................................................................ 52

5.3.1.1 General ........................................................................................................................................................ 52

5.3.1.2 Home KMS ........................................................................................................................................... 53

5.3.1.3 Migration KMS ..................................................................................................................................... 53

5.3.1.4 External KMS ....................................................................................................................................... 54

5.3.2 Functional model for key management ....................................................................................................... 54

5.3.3 Security procedures for key management ................................................................................................... 55

5.3.4 Provisioned key material to support end-to-end communication security .................................................. 56

5.3.5 KMS Certificate .......................................................................................................................................... 57

5.3.6 KMS provisioned Key Set .......................................................................................................................... 57

5.4 Key management from MC client to MC server (CSK upload) ....................................................................... 58

5.5 Key management between MCX servers (SPK) .............................................................................................. 58

5.6 Key management for one-to-one (private) communications (PCK) ................................................................. 58

5.7 Key management for group communications (GMK) ...................................................................................... 59

5.7.1 General ........................................................................................................................................................ 59

5.7.2 Security procedures for GMK provisioning ................................................................................................ 59

5.7.3 Group member GMK management ............................................................................................................ 60

5.8 Key management from MC server to MC client (Key download) ................................................................... 61

5.8.1 General ........................................................................................................................................................ 61

5.8.2 ‘Key download' procedure .......................................................................................................................... 61

5.9 Key management during MBMS bearer announcement ............................................................................. 62

5.10 Void .................................................................................................................................................................. 62

5.10.1 Void ............................................................................................................................................................ 62

5.10.2 Void ............................................................................................................................................................ 62

5.10.3 Void ............................................................................................................................................................ 62

5.10.3.1 Void....................................................................................................................................................... 62

5.10.3.2 Void....................................................................................................................................................... 62

5.10.3.3 Void....................................................................................................................................................... 62

5.10.3.4 Void....................................................................................................................................................... 62

5.10.3.5 Void....................................................................................................................................................... 62

5.10.4 Void ............................................................................................................................................................ 62

5.10.4.1 Void....................................................................................................................................................... 62

5.10.4.2 Void....................................................................................................................................................... 62

5.11 UE key storage and key persistence ................................................................................................................. 62

5.11.1 Key storage ................................................................................................................................................. 62

5.11.2 Key persistence ........................................................................................................................................... 63

6 Supporting security mechanisms ............................................................................................................ 63

6.1 HTTP ................................................................................................................................................................ 63

6.1.1 Authentication for HTTP-1 interface .......................................................................................................... 63

6.1.2 HTTP-1 interface security .......................................................................................................................... 64

6.1.3 HTTP-3 interface security .......................................................................................................................... 64

6.2 SIP .................................................................................................................................................................... 64

6.2.1 Authentication for SIP core access ............................................................................................................. 64

6.2.2 SIP-1 interface security ............................................................................................................................... 64

6.3 Network domain security ................................................................................................................................. 64

6.3.1 LTE access authentication and security ...................................................................................................... 64

6.3.2 Inter/Intra domain interface security ........................................................................................................... 64

ETSI
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3GPP TS 33.180 version 15.7.0 Release 15 5 ETSI TS 133 180 V15.7.0 (2020-01)

7 MCPTT and MCVideo ........................................................................................................................... 65

7.1 General ............................................................................................................................................................. 65

7.2 Private communications ................................................................................................................................... 65

7.2.1 Key management ........................................................................................................................................ 65

7.2.2 Security procedures (on-network) ............................................................................................................... 65

7.2.3 Security procedures (off-network) .............................................................................................................. 67

7.2.4 First-to-answer security and key management ............................................................................................ 68

7.2.4.1 Overview ............................................................................................................................................... 68

7.2.4.2 First-to-answer request and response .................................................................................................... 69

7.2.4.3 First-to-answer call setup with security................................................................................................. 69

7.2.4.4 First-to-answer media protection .......................................................................................................... 71

7.2.5 Ambient listening call ................................................................................................................................. 71

7.2.6 Ambient viewing call .................................................................................................................................. 71

7.2.7 Private video pull ........................................................................................................................................ 72

7.2.7.1 One-to-one video pull ........................................................................................................................... 72

7.2.7.2 One-from-server video pull ................................................................................................................... 72

7.2.8 Private video push ....................................................................................................................................... 73

7.2.8.1 One-to-one video push .......................................................................................................................... 73

7.2.8.2 One-to-server video push ...................................................................................................................... 74

7.2.8.3 Remotely initiated video push ............................................................................................................... 74

7.3 Group communications .................................................................................................................................... 76

7.3.1 General ........................................................................................................................................................ 76

7.3.2 Group creation security procedure .............................................................................................................. 76

7.3.3 Dynamic group keying ................................................................................................................................ 76

7.3.3.1 General .................................................................................................................................................. 76

7.3.3.2 Group regrouping security procedure (within a single MC domain) .................................................... 77

7.3.3.3 Group regrouping security procedure (involving multiple MC domains) ............................................. 77

7.3.4 Broadcast group call ................................................................................................................................... 78

7.3.5 Group-broadcast group call......................................................................................................................... 78

7.3.6 Emergency group call ................................................................................................................................. 79

7.3.7 Imminent peril group call ........................................................................................................................... 79

7.3.8 Emergency Alert ......................................................................................................................................... 79

7.3.9 Remotely initiated video push to group ...................................................................................................... 80

7.3.10 Multi-talker configured MCPTT group ...................................................................................................... 81

7.4 Key derivation for media .................................................................................................................................. 82

7.4.1 Derivation of SRTP master keys for private call ........................................................................................ 82

7.4.2 Derivation of SRTP master keys for group media ...................................................................................... 82

7.5 Media protection profile ................................................................................................................................... 83

7.5.1 General ........................................................................................................................................................ 83

7.5.2 Security procedures for media stream protection........................................................................................ 84

8 MCData .................................................................................................................................................. 86

8.1 Overview .......................................................................................................................................................... 86

8.2 Key Management ............................................................................................................................................. 87

8.3 One-to-one communications ............................................................................................................................ 88

8.4 Group communications .................................................................................................................

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