TS 33.503 – 5G ProSe Security Specification
3GPP TS 33.503 is the 3GPP Technical Specification for 5G ProSe Security Specification. Its official 3GPP title is “Security aspects of Proximity based Services (ProSe)”. It is published in 4 releases (Rel-17 to Rel-20); the latest version is 20.0.0 in Rel-20.
Specifies security and privacy for 5G ProSe, including direct discovery, direct communication, UE-to-Network and UE-to-UE relay security.
Releases and versions of TS 33.503
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.0.0 | Read · Download (3GPP) |
| Rel-19 | 19.3.0 | Read · Download (3GPP) |
| Rel-18 | 18.6.0 | Read · Download (3GPP) |
| Rel-17 | 17.10.0 | Read · Download (3GPP) |
Scope of TS 33.503
Primary function: Protocol Definition and Security Procedures. Category: Security (ProSe Security). Technology generation: 5G. Network layer: Security.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Expert. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 33.503
- TS 23.502 5G System Procedures
- TS 33.102 3G Security Architecture Specification
- TR 21.905 3GPP Terminology and Definitions
- TS 23.304 5G Proximity Services (ProSe) Stage 2
- TS 33.501 5G Security Architecture
- TS 33.303 ProSe Security Specification for EPS
- TS 33.535 5G AKMA: Authentication and Key Management for Apps
- TS 33.536 5G V2X Security for NR PC5
- TS 23.503 5G Policy and Charging Control Framework
- TS 33.220 Generic Authentication Architecture (GAA) Security
- TS 33.223 GBA Push Function Specification
Specifications that reference TS 33.503
- TS 23.501 5G System Architecture
- TS 33.501 5G Security Architecture
- TS 29.571 5G Common Data Types
- TS 24.501 5GS NAS Protocol Specification
- TS 33.220 Generic Authentication Architecture (GAA) Security
- TS 23.273 5G Location Services Architecture Stage 2
- TS 29.503 UDM Service Based Interface
- TS 23.304 5G Proximity Services (ProSe) Stage 2
- TS 23.700 Study on SEAL Phase 4
- TS 24.554 5G ProSe Protocols and Procedures
- TS 29.509 AUSF Service Based Interface
- TS 33.533 Security for 5G Ranging & Sidelink Positioning
Other specifications in the 33 series
- TS 33.402 Security for non-3GPP access to EPS
- TS 33.434 Security aspects of SEAL for verticals
- TS 33.501 5G Security Architecture
- TS 33.502 Security Events Handling in 5G SBA
- TS 33.511 5G gNB Security Assurance Specification
- TS 33.512 AMF Security Assurance Specification
- TS 33.513 UPF Security Assurance Specification
- TS 33.514 UDM Security Assurance Specification
Frequently asked questions
What is 3GPP TS 33.503?
3GPP TS 33.503 is the 3GPP Technical Specification for 5G ProSe Security Specification. Specifies security and privacy for 5G ProSe, including direct discovery, direct communication, UE-to-Network and UE-to-UE relay security.
Which 3GPP releases include TS 33.503?
TS 33.503 is published in 4 releases, from Rel-17 to Rel-20. The latest version on 3GPP Explorer is 20.0.0 (Rel-20).
What does TS 33.503 specify?
Protocol Definition and Security Procedures.
What category does TS 33.503 belong to?
TS 33.503 belongs to the Security (ProSe Security) category of 3GPP specifications. It applies to 5G networks.
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