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Radio Frequency Identification Transponder Security

  • US 20080042804A1
  • Filed: 01/11/2006
  • Published: 02/21/2008
  • Est. Priority Date: 01/12/2005
  • Status: Active Grant
First Claim
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1. A radio frequency identification transponder configured to respond, on detecting an interrogation attempt, by providing an output which is an identifier, the identifier being, or being based upon, a leaf or a node of a hash tree of at least binary order, wherein the identifier which is provided is different for every detected interrogation attempt.

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