ETSI TS 133 501 V17.9.0 (2023-04)

5G; Security architecture and procedures for 5G System (3GPP TS 33.501 version 17.9.0 Release 17)

RTS/TSGS-0333501vh90

General Information

• Status: Not Published
• Technical Committee: 3GPP SA 3 - Security
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 24-Apr-2023

Standards Content (Sample)

ETSI TS 133 501 V17.9.0 (2023-04)






TECHNICAL SPECIFICATION
5G;
Security architecture and procedures for 5G System
(3GPP TS 33.501 version 17.9.0 Release 17)

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3GPP TS 33.501 version 17.9.0 Release 17 1 ETSI TS 133 501 V17.9.0 (2023-04)

Reference
RTS/TSGS-0333501vh90
Keywords
5G
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ETSI

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3GPP TS 33.501 version 17.9.0 Release 17 2 ETSI TS 133 501 V17.9.0 (2023-04)
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3GPP TS 33.501 version 17.9.0 Release 17 3 ETSI TS 133 501 V17.9.0 (2023-04)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 16
1 Scope . 17
2 References . 17
3 Definitions and abbreviations . 21
3.1 Definitions . 21
3.2 Abbreviations . 24
4 Overview of security architecture . 26
4.1 Security domains . 26
4.2 Security at the perimeter of the 5G Core network . 27
4.2.0 General . 27
4.2.1 Security Edge Protection Proxy (SEPP) . 27
4.2.2 Inter-PLMN UP Security (IPUPS) . 28
4.3 Security entities in the 5G Core network . 28
5 Security requirements and features . 28
5.1 General security requirements . 28
5.1.1 Mitigation of bidding down attacks . 28
5.1.2 Authentication and Authorization . 28
5.1.3 Requirements on 5GC and NG-RAN related to keys . 29
5.2 Requirements on the UE . 29
5.2.1 General . 29
5.2.2 User data and signalling data confidentiality . 29
5.2.3 User data and signalling data integrity . 29
5.2.4 Secure storage and processing of subscription credentials . 30
5.2.5 Subscriber privacy . 30
5.3 Requirements on the gNB . 31
5.3.1 General . 31
5.3.2 User data and signalling data confidentiality . 31
5.3.3 User data and signalling data integrity . 31
5.3.4 Requirements for the gNB setup and configuration . 32
5.3.5 Requirements for key management inside the gNB . 32
5.3.6 Requirements for handling user plane data for the gNB . 32
5.3.7 Requirements for handling control plane data for the gNB . 33
5.3.8 Requirements for secure environment of the gNB . 33
5.3.9 Requirements for the gNB F1 interfaces. 33
5.3.10 Requirements for the gNB E1 interfaces . 33
5.4 Requirements on the ng-eNB . 33
5.5 Requirements on the AMF . 34
5.5.1 Signalling data confidentiality . 34
5.5.2 Signalling data integrity . 34
5.5.3 Subscriber privacy . 34
5.6 Requirements on the SEAF . 34
5.7 Void . 35
5.8 Requirements on the UDM . 35
5.8.1 Generic requirements . 35
5.8.2 Subscriber privacy related requirements to UDM and SIDF . 35
5.8a Requirements on AUSF . 35
5.9 Core network security . 35
5.9.1 Trust boundaries . 35
5.9.2 Requirements on service-based architecture . 35
5.9.2.1 Security Requirements for service registration, discovery and authorization . 35
ETSI

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3GPP TS 33.501 version 17.9.0 Release 17 4 ETSI TS 133 501 V17.9.0 (2023-04)
5.9.2.2 NRF security requirements . 36
5.9.2.3 NEF security requirements . 36
5.9.2.4 Requirements on the Service Communication Proxy (SCP) . 36
5.9.3 Requirements for e2e core network interconnection security . 37
5.9.3.1 General . 37
5.9.3.2 Requirements for Security Edge Protection Proxy (SEPP) . 37
5.9.3.3 Protection of attributes . 38
5.9.3.4 Requirements for IPUPS functionality . 39
5.9.3.5 Requirements for Network Functions (NF) . 39
5.10 Visibility and configurability . 39
5.10.1 Security visibility . 39
5.10.2 Security configurability . 39
5.11 Requirements for algorithms, and algorithm selection . 40
5.11.1 Algorithm identifier values . 40
5.11.1.1 Ciphering algorithm identifier values. 40
5.11.1.2 Integrity algorithm identifier values . 40
5.11.2 Requirements for algorithm selection . 40
5.12 Requirements on 5G-RG . 41
5.13 Requirements on NSSAAF . 41
6 Security procedures between UE and 5G network functions . 41
6.0 General . 41
6.1 Primary authentication and key agreement . 42
6.1.1 Authentication framework . 42
6.1.1.1 General . 42
6.1.1.2 EAP fra me wor k . 43
6.1.1.3 Granularity of anchor key binding to serving network. 43
6.1.1.4 Construction of the serving network name . 43
6.1.1.4.1 Serving network name . 43
6.1.1.4.2 Construction of the serving network name by the UE . 43
6.1.1.4.3 Construction of the serving network name by the SEAF . 44
6.1.2 Initiation of authentication and selection of authentication method . 44
6.1.3 Authentication procedures . 45
6.1.3.1 Authentication procedure for EAP-AKA' . 45
6.1.3.2 Authentication procedure for 5G AKA . 48
6.1.3.2.0 5G AKA . 48
6.1.3.2.1 Void . 50
6.1.3.2.2 RES* verification failure in SEAF or AUSF or both . 50
6.1.3.3 Synchronization failure or MAC failure . 50
6.1.3.3.1 Synchronization failure or MAC failure in USIM . 50
6.1.3.3.2 Synchronization failure recovery in Home Network . 50
6.1.4 Linking increased home control to subsequent procedures . 51
6.1.4.1 Introduction . 51
6.1.4.1a Linking authentication confirmation to Nudm_UECM_Registration procedure from AMF . 52
6.1.4.2 Guidance on linking authentication confirmation to Nudm_UECM_Registration procedure from
AMF . 52
6.2 Key hierarchy, key derivation, and distribution scheme . 53
6.2.1 Key hierarchy . 53
6.2.2 Key derivation and distribution scheme . 55
6.2.2.1 Keys in network entities . 55
6.2.2.2 Keys in the UE . 57
6.2.3 Handling of user-related keys . 59
6.2.3.1 Key setting . 59
6.2.3.2 Key identification . 59
6.2.3.3 Key lifetimes . 60
6.3 Security contexts . 61
6.3.1 Distribution of security contexts . 61
6.3.1.1 General . 61
6.3.1.2 Distribution of subscriber identities and security data within one 5G serving network domain . 61
6.3.1.3 Distribution of subscriber identities and security data between 5G serving network domains . 61
6.3.1.4 Distribution of subscriber identities and security data between 5G and EPS serving network
domains . 61
ETSI

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3GPP TS 33.501 version 17.9.0 Release 17 5 ETSI TS 133 501 V17.9.0 (2023-04)
6.3.2 Multiple registrations in same or different serving networks . 62
6.3.2.0 General . 62
6.3.2.1 Multiple registrations in different PLMNs . 62
6.3.2.2 Multiple registrations in the same PLMN . 62
6.4 NAS security mechanisms . 63
6.4.1 General . 63
6.4.2 Security for multiple NAS connections . 63
6.4.2.1 Multiple active NAS connections with different PLMNs . 63
6.4.2.2 Multiple active NAS connections in the same PLMN's serving network . 63
6.4.3 NAS integrity mechanisms . 64
6.4.3.0 General . 64
6.4.3.1 NAS input parameters to integrity algorithm . 64
6.4.3.2 NAS integrity activation . 65
6.4.3.3 NAS integrity failure handling . 65
6.4.4 NAS confidentiality mechanisms . 65
6.4.4.0 General . 65
6.4.4.1 NAS input parameters to confidentiality algorithm . 65
6.4.4.2 NAS confidentiality activation . 65
6.4.5 Handling of NAS COUNTs . 65
6.4.6 Protection of initial NAS message . 66
6.4.7 Security aspects of SMS over NAS . 67
6.5 RRC security mechanisms . 67
6.5.1 RRC integrity mechanisms . 67
6.5.2 RRC confidentiality mechanisms . 68
6.5.3 RRC UE capability transfer procedure . 68
6.6 UP security mechanisms . 68
6.6.1 UP security policy . 68
6.6.2 UP security activation mechanism . 69
6.6.3 UP confidentiality mechanisms . 71
6.6.4 UP integrity mechanisms . 71
6.6.4.1 General . 71
6.6.4.2 UP integrity mechanisms between the UE and the gNB . 71
6.6.4.3 UP integrity mechanisms between the UE and the ng-eNB . 71
6.7 Security algorithm selection, key establishment and security mode command procedure . 72
6.7.1 Procedures for NAS algorithm selection . 72
6.7.1.1 Initial NAS security context establishment . 72
6.7.1.2 AMF change . 72
6.7.2 NAS security mode command procedure .
...