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Apparatus, method and system for authentication

  • US 7,053,771 B2
  • Filed: 03/26/2003
  • Issued: 05/30/2006
  • Est. Priority Date: 03/26/2002
  • Status: Expired due to Term
First Claim
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1. A portable, electronic device comprising a transponder with a memory unit, and means for writing user-specific information into the transponder memory unit, so that the transponder, upon reception of an interrogating signal containing a request code, generates a response signal comprising the user-specific information, the portable, electronic device further comprising calculating means for calculating an authentication code, to be included in the user-specific information, wherein the authentication code is calculated based on a user-specific key stored in the portable, electronic device, and the request code.

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