TS 33.203 – IMS Security Features and Mechanisms
3GPP TS 33.203 is the 3GPP Technical Specification for IMS Security Features and Mechanisms. Its official 3GPP title is “Access security for IP-based services”. It is published in 13 releases (Rel-8 to Rel-20); the latest version is 20.0.0 in Rel-20.
Specifies security for IMS access: SIP signaling protection, subscriber authentication, and mutual authentication between UE and network.
Releases and versions of TS 33.203
| Release | Latest version | Links |
|---|---|---|
| Rel-20 | 20.0.0 | Read · Download (3GPP) |
| Rel-19 | 19.1.0 | Read · Download (3GPP) |
| Rel-18 | 18.1.0 | Read · Download (3GPP) |
| Rel-17 | 17.1.0 | Read · Download (3GPP) |
| Rel-16 | 16.1.0 | Read · Download (3GPP) |
| Rel-15 | 15.3.0 | Read · Download (3GPP) |
| Rel-14 | 14.3.0 | Read · Download (3GPP) |
| Rel-13 | 13.4.0 | Read · Download (3GPP) |
| Rel-12 | 12.9.0 | Read · Download (3GPP) |
| Rel-11 | 11.2.0 | Read · Download (3GPP) |
| Rel-10 | 10.3.0 | Read · Download (3GPP) |
| Rel-9 | 9.5.0 | Read · Download (3GPP) |
| Rel-8 | 8.8.0 | Read · Download (3GPP) |
Scope of TS 33.203
Category: Security (IMS Security). Technology generation: Multi-Gen. Network layer: Security.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Advanced. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 33.203
- TS 23.060 GPRS Stage 2 Service Description
- TS 24.228 IMS SIP Signaling Flows Examples
- TS 33.102 3G Security Architecture Specification
- TS 33.310 3GPP Authentication Framework for Network Nodes
- TS 23.167 IMS Emergency Services
- TS 29.228 IMS Cx and Dx Interface Procedures
- TS 23.228 IP Multimedia Core Network Subsystem
- TS 23.003 Numbering, Addressing and Identification
- TS 23.292 IMS Centralized Services (ICS) Architecture
- TS 31.103 IM Services Identity Module Specification
- TS 23.401 Evolved Packet System Architecture
- TS 33.210 Network Domain Security for IP Networks
Specifications that reference TS 33.203
- TS 24.229 IMS SIP/SDP Call Control Protocol
- TS 23.228 IP Multimedia Core Network Subsystem
- TS 33.210 Network Domain Security for IP Networks
- TS 33.220 Generic Authentication Architecture (GAA) Security
- TS 33.310 3GPP Authentication Framework for Network Nodes
- TS 29.228 IMS Cx and Dx Interface Procedures
- TS 32.260 IMS Charging Management
- TS 23.167 IMS Emergency Services
- TS 23.237 IMS Service Continuity (ISC) Stage 2
- TS 23.700 Study on SEAL Phase 4
- TS 23.292 IMS Centralized Services (ICS) Architecture
- TS 33.402 Security for non-3GPP access to EPS
Other specifications in the 33 series
- TS 33.179 MCPTT Security Architecture and Procedures
- TS 33.180 Security of the Mission Critical Service (MCX)
- TS 33.185 V2X Security in LTE
- TS 33.187 Security for Machine-Type Communications Enhancements
- TS 33.204 TCAP Security (TCAPsec) Stage 2 Specification
- TS 33.210 Network Domain Security for IP Networks
- TS 33.216 Security Assurance Specification (SCAS) for eNB
- TS 33.220 Generic Authentication Architecture (GAA) Security
Frequently asked questions
What is 3GPP TS 33.203?
3GPP TS 33.203 is the 3GPP Technical Specification for IMS Security Features and Mechanisms. Specifies security for IMS access: SIP signaling protection, subscriber authentication, and mutual authentication between UE and network.
Which 3GPP releases include TS 33.203?
TS 33.203 is published in 13 releases, from Rel-8 to Rel-20. The latest version on 3GPP Explorer is 20.0.0 (Rel-20).
What category does TS 33.203 belong to?
TS 33.203 belongs to the Security (IMS Security) category of 3GPP specifications. It applies to Multi-Gen networks.
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