tech-invite   World Map     

IETF     RFCs     Groups     SIP     ABNFs    |    3GPP     Specs     Glossaries     Architecture     IMS     UICC    |    search

Top          in Index          Prev          Next

TS 55.226 (SA3)
Specification of the
A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS

|   ToC   |   3GPP‑Page   |   ETSI‑search   |   Help   |

(P) V14.0    2017/03    8 p.
(P) V13.0    2016/01    8 p.
(P) V12.0    2014/09    8 p.
(P) V11.0    2012/09    8 p.
(P) V10.0    2011/04    8 p.
(P) V9.0    2011/02    8 p.

Rapporteur:  Mr. Christoffersson, Per
Antecedent:  TS 55.216    

This specification of the A5/4 encryption algorithms for GSM and ECSD, and of the GEA4 encryption algorithm for GPRS has been derived from TS 55.216. The only essential change is the change of external key length input from 64 bits to 128 bits.

This document should be read in conjunction with the entire specification of the A5/3 and GEA3 algorithms

The normative part of the specification of the block cipher (KASUMI) on which the A5/3, A5/4, GEA3 and GEA4 algorithms are based can be found in TS 35.202.


Here          Top