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Authentication Token for Identifying a Cloning Attack onto such Authentication Token

  • US 20090177882A1
  • Filed: 02/15/2007
  • Published: 07/09/2009
  • Est. Priority Date: 02/22/2006
  • Status: Active Grant
First Claim
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1. An authentication token for a communication network comprising:

  • a microprocessor;

    a memory;

    a stored secret key (Ki); and

    a set of instructions for controlling the microprocessor into performing an authentication calculation on the basis of a received random value (RAND) and on the basis of the stored secret key, wherein that it the authentication token further comprises;

    a memory location dedicated for storing a counter value; and

    instructions for making the counter value evolve each time the authentication calculation is performed.

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