TS 55.251 – GEA5 and GIA5 Encryption Algorithm Specification
3GPP TS 55.251 is the 3GPP Technical Specification for GEA5 and GIA5 Encryption Algorithm Specification. It is published in 7 releases (Rel-13 to Rel-19); the latest version is 19.0.0 in Rel-19.
Specifies the GEA5 confidentiality and GIA5 integrity algorithms for GPRS, based on SNOW 3G.
Releases and versions of TS 55.251
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.0.0 | Read · Download (3GPP) |
| Rel-18 | 18.0.0 | Read · Download (3GPP) |
| Rel-17 | 17.0.0 | Read · Download (3GPP) |
| Rel-16 | 16.0.0 | Read · Download (3GPP) |
| Rel-15 | 15.0.0 | Read · Download (3GPP) |
| Rel-14 | 14.0.1 | Read · Download (3GPP) |
| Rel-13 | 13.0.1 | Read · Download (3GPP) |
Scope of TS 55.251
Category: Security (Encryption Algorithms). Technology generation: 3G. Network layer: Security.
Who should read this specification?
- Device manufacturers
- Network operators
- Researchers and academics
Implementation notes
Complexity level: Expert. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 55.251
Specifications that reference TS 55.251
Other specifications in the 55 series
- TS 55.236 A8_V MILENAGE Algorithm for VGCS/VBS Security
- TS 55.241 3GPP Integrity Algorithm GIA4 Specification
- TS 55.242 GIA4 Integrity Algorithm Test Data Specification
- TS 55.243 GIA4 Integrity Algorithm Design Test Data
- TS 55.252 GEA5/GIA5 Implementers' Test Data Specification
- TS 55.253 GEA5/GIA5 Design Conformance Test Data
- TR 55.919 A5/3 and GEA3 Encryption Algorithm Design Report
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 55.251?
3GPP TS 55.251 is the 3GPP Technical Specification for GEA5 and GIA5 Encryption Algorithm Specification. Specifies the GEA5 confidentiality and GIA5 integrity algorithms for GPRS, based on SNOW 3G.
Which 3GPP releases include TS 55.251?
TS 55.251 is published in 7 releases, from Rel-13 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 55.251 belong to?
TS 55.251 belongs to the Security (Encryption Algorithms) category of 3GPP specifications. It applies to 3G networks.
View the full specification with interactive table of contents, version history, and AI analysis.
Read Full Specification →