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Method, transponder, and system for secure data exchange

  • US 8,138,889 B2
  • Filed: 06/25/2007
  • Issued: 03/20/2012
  • Est. Priority Date: 06/23/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • transmitting a first code, by a transponder, in response to receiving a first request from a base station;

    receiving first encoded transmission information from the base station, the first encoded transmission information comprising a base station code encoded using the first code and a first identification;

    extracting the base station code from the first encoded transmission information using the first code and the first identification;

    transmitting a second code in response to receiving a second request from the base station, the second code encoded using the extracted base station code;

    receiving second encoded transmission information from the base station, the second encoded transmission information comprising a second identification encoded by the base station using the second code;

    extracting the second identification from the second encoded transmission information using the second code; and

    comparing the extracted second identification to a stored version of the second identification, access toat least one memory region of the transponder provided based on the comparing of the extracted second identification.

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