RF transaction authentication using a random number

  • US 8,066,181 B2
  • Filed: 10/22/2008
  • Issued: 11/29/2011
  • Est. Priority Date: 07/10/2001
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating, in a radio frequency identification (RFID) transaction device, an RFID transaction device authentication tag using a random number, a transaction device identifier, and a counter value, wherein the random number is received from an RFID reader;

    transmitting the RFID transaction device authentication tag to the RFID reader; and

    incrementing the counter value;

    wherein an RFID transaction is authorized in response to verification of the RFID transaction device authentication tag.

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