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Local authentication in a communication system

  • US 20020091931A1
  • Filed: 01/05/2001
  • Published: 07/11/2002
  • Est. Priority Date: 01/05/2001
  • Status: Abandoned Application
First Claim
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1. A subscriber identification module for providing local authentication of a subscriber in a communication system, comprising:

  • a memory; and

    a processor configured to implement a set of instructions stored in the memory, the set of instructions for;

    generating a plurality of keys in response to a received challenge;

    generating an authentication signal based on a received signal and a first key from the plurality of keys, wherein the received signal is transmitted from a communications unit communicatively coupled to the subscriber identification module, and the received signal is generated by the communications unit using a second key from the plurality of keys, the second key having been communicated from the subscriber identification module to the communications unit; and

    transmitting the authentication signal to the communications system via the communications unit.

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