Cryptanalysis of Alleged A5 Stream Cipher

  • Jovan Dj. Golit
  • Published 2002


Abs t rac t . A binary stream cipher, known as A5, consisting of three short LFSRs of total length 64 that are mutually clocked in the stop/go manner is cryptanalyzed. It is allegedly used in the GSM standard for digital cellular mobile telephones. Very short keystream sequences are generated from different initial states obtained by combining a 64-bit… (More)


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