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SSD - Shared Secret Data

A key of length 128bits, stored in the MS (Mobile Station) and known by the BS (Base Station). The SSD is a concatenation of two 64bit subsets: SSD_A , used in the authentication procedures, and SSD_B , used along with other parameters to generate the encryption mask and private long code.


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

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