A8 - Ciphering Key Generating Algorithm A8

This algorithm is used in conjunction with Ki , the authentication key, and RAND (Random Number) to generate Kc (Cipher Key). This is used with A5/X to cipher the data stream between the MS (Mobile Station) and the GSM network.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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