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ETSI TS 155 226

Original price was: $54.50.Current price is: $27.25.

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 aconfidentiality 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); wethen 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.
Edition:
13.0.0
Published:
01/01/2016
Number of Pages:
8
File Size:
1 file , 84 KB
Note:
This product is unavailable in Russia, Ukraine, Belarus

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ETSI TS 155 226
Original price was: $54.50.Current price is: $27.25.