Tech-
invite
3GPP
space
IETF
space
◀
▶
21
22
23
24
25
26
27
28
29
31
32
33
34
35
36
37
38
4‑5x
TR 33.743
Study on Security aspects of enhancement for Proximity-based Services (ProSe) in the 5GS Phase 3
3GPP‑Page
fToC
↓
Partial Content
→
V19.0.0 (Wzip)
2025/03 50 p.
Rapporteur:
Dr. Lei, Ao
HUAWEI TECHNOLOGIES Co. Ltd.
full Table of Contents for
TR 33.743
Word version: 19.0.0
each clause number in
'red'
refers to the equivalent title in the Partial Content
1
Scope
p. 7
2
References
p. 7
3
Definitions of terms, symbols and abbreviations
p. 7
3.1
Terms
p. 7
3.2
Symbols
p. 8
3.3
Abbreviations
p. 8
4
Overview and Security Assumptions
p. 8
5
Key issues
p. 9
5.1
Key issue #1: Security for multi-hop UE-to-Network Relay
p. 9
5.1.1
Key issue details
p. 9
5.1.2
Threats
p. 9
5.1.3
Potential security requirements
p. 9
5.2
Key Issue #2: Security for Multi-hop UE-to-UE Relay
p. 10
5.2.1
Key issue details
p. 10
5.2.2
Security threats
p. 10
5.2.3
Potential security requirements
p. 10
6
Solutions
p. 10
6.1
Solution #1: Security for multi-hop UE-to-Network Relay using an intermediate key
p. 10
6.1.1
Introduction
p. 10
6.1.2
Solution details
p. 11
6.1.2.1
Security procedure over User Plane
p. 11
6.1.2.2
Security procedure over Control Plane
p. 12
6.1.2.3
Key Hierarchy
p. 13
6.1.3
Evaluation
p. 13
6.2
Solution #2: Security of multi-hop UE-to-Network Relay discovery Model A
p. 14
6.2.1
Introduction
p. 14
6.2.2
Solution details
p. 14
6.2.2.0
Security procedure
p. 14
6.2.2.1
Provisioning the intermediate relay discovery security material
p. 17
6.2.3
Evaluation
p. 18
6.3
Solution #3: Security of multi-hop UE-to-Network Relay discovery Model B
p. 18
6.3.1
Introduction
p. 18
6.3.2
Solution details
p. 19
6.3.2.0
Security procedure
p. 19
6.3.2.1
Provisioning the intermediate relay discovery security material
p. 21
6.3.3
Evaluation
p. 22
6.4
Solution #4: Security of multi-hop UE-to-Network Relay communication
p. 22
6.4.1
Introduction
p. 22
6.4.2
Solution details
p. 23
6.4.3
Evaluation
p. 25
6.5
Solution #5: Security establishment for multi-hop UE-to-Network Relay
p. 25
6.5.1
Introduction
p. 25
6.5.2
Solution details
p. 26
6.5.3
Evaluation
p. 27
6.6
Solution #6: Security for multi-hop UE-to-Network Relay Communication
p. 28
6.6.1
Introduction
p. 28
6.6.2
Security procedure for each hop PC5 Link
p. 29
6.6.3
Security procedure for 5G ProSe Multi-hop Layer-3 UE-to-Network Relay Communication with N3IWF support
p. 29
6.6.4
Security procedure for 5G ProSe Multi-hop Layer-3 UE-to-Network Relay Communication without N3IWF support
p. 29
6.6.5
Security procedure for 5G ProSe Multi-hop Layer-2 UE-to-Network Relay Communication
p. 30
6.6.6
Evaluation
p. 30
6.7
Solution #7: Multi-hop UE-to-network Relay discovery security procedure
p. 31
6.7.1
Introduction
p. 31
6.7.2
Solution details
p. 31
6.7.2.1
Multi-hop UE-to-Network Relay Discovery security procedure with Model A
p. 31
6.7.2.2
Multi-hop UE-to-Network Relay Discovery security procedure with Model B
p. 32
6.7.3
Evaluation
p. 33
6.8
Solution #8: Multi-hop UE-to-network Relay security establishment procedure
p. 33
6.8.1
Introduction
p. 33
6.8.2
Solution details
p. 34
6.8.3
Evaluation
p. 34
6.9
Solution #9: Multi-hop UE-to-Network Relay discovery security
p. 35
6.9.1
Introduction
p. 35
6.9.2
Solution details
p. 35
6.9.2.1
Discovery with Model A
p. 35
6.9.2.2
Discovery with Model B
p. 36
6.9.3
Evaluation
p. 37
6.10
Solution #10: Multi-hop UE-to-Network Relay communication security
p. 37
6.10.1
Introduction
p. 37
6.10.2
Solution details
p. 37
6.10.3
Evaluation
p. 38
6.11
Solution #11: Security establishment for multi-hop UE-to-UE Relay
p. 39
6.11.1
Introduction
p. 39
6.11.2
Solution details
p. 39
6.11.2.0
General
p. 39
6.11.2.1
Security mechanism with network assistance
p. 39
6.11.2.2
Security mechanism without network assistance
p. 40
6.11.3
Evaluation
p. 40
6.12
Solution #12: Solution of multi-hop UE-to-UE Relay Communication
p. 40
6.12.1
Introduction
p. 40
6.12.2
Solution details
p. 40
6.12.3
Evaluation
p. 41
6.13
Solution #13: Solution of multi-hop UE-to-UE Relays Discovery Model B
p. 41
6.13.1
Introduction
p. 41
6.13.2
Solution details
p. 41
6.13.3
Evaluation
p. 43
6.14
Solution #14: Multi-hop UE-to-UE Relay discovery security
p. 43
6.14.1
Introduction
p. 43
6.14.2
Solution details
p. 43
6.14.3
Evaluation
p. 44
6.15
Solution #15: Multi-hop UE-to-UE Relay communication security
p. 44
6.15.1
Introduction
p. 44
6.15.2
Solution details
p. 44
6.15.3
Evaluation
p. 45
6.16
Solution #16: Multi-hop UE-to-Network Relay communication security after discovery with Model B
p. 45
6.16.1
Introduction
p. 45
6.16.2
Solution details
p. 45
6.16.3
Evaluation
p. 46
6.17
Solution #17: Multi-hop UE-to-UE Model A discovery security in non-IP scenario
p. 46
6.17.1
Introduction
p. 46
6.17.2
Solution details
p. 46
6.17.3
Evaluation
p. 47
7
Conclusions
p. 47
7.1
Key Issue #2: Security for Multi-hop UE-to-UE Relay
p. 47
7.2
Key issue #1: Security for multi-hop UE-to-Network Relay
p. 48
$
Change history
p. 50