1990895 Preview

ETSI TS 155 226

Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 14.0.0 Release 14)

standard by European Telecommunications Standards Institute , 04/01/2017

This document has been replaced. View the most recent version.

View all product details

Historical

Track It

Language:
    • Available Formats
    •  
    • Availability
    • Priced From ( in USD )
    • Printed Edition
    • Ships in 1-2 business days
    • $27.25
    • Add to Cart

Customers Who Bought This Also Bought

 

About This Item

 

Full Description

In this document are specified three ciphering algorithms: A5/4 for GSM, A5/4 for ECSD, and GEA4 for GPRS (including EGPRS). The algorithms are stream ciphers that are used to encrypt/decrypt blocks of data under a confidentiality key KC. Each of these algorithms is based on the KASUMI algorithm that is specified in TS 35.202 [5]. The three algorithms are all very similar. We first define a core keystream generator function KGCORE (clause 4); we then specify each of the three algorithms in turn (clauses 5, 6 and 7) in terms of this core function.
Note that:
  • GSM A5/4 is the same algorithms as GSM A5/3 but with KLEN changed from 64 to 128 bits.
  • and ECSD A5/4 is the same algorithms as ECSD A5/3 but with KLEN changed from 64 to 128 bits.
  • and GEA 4 is the same algorithms as GEA3 but with KLEN changed from 64 to 128 bits.
 

Product Details

Edition:
14.0.0
Published:
04/01/2017
Number of Pages:
8
File Size:
1 file , 58 KB
Note:
This product is unavailable in Russia, Ukraine, Belarus
 

Document History

  1. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+) (GSM); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 16.0.0 Release 16)

    • Most Recent

  2. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+) (GSM); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 15.0.0 Release 15)

    • Historical Version

  3. ETSI TS 155 226

    👀 currently
    viewing


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 14.0.0 Release 14)

    • Historical Version

  4. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 13.0.0 Release 13)

    • Historical Version

  5. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 12.0.0 Release 12)

    • Historical Version

  6. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 11.0.0 Release 11)

    • Historical Version

  7. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 10.0.0 Release 10)

    • Historical Version

  8. ETSI TS 155 226


    Digital cellular telecommunications system (Phase 2+); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 9.0.0 Release 9)

    • Historical Version