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RFID tag detection and re-personalization

  • US 8,917,165 B2
  • Filed: 02/28/2008
  • Issued: 12/23/2014
  • Est. Priority Date: 03/08/2007
  • Status: Active Grant
First Claim
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1. A method of detecting and re-personalizing RFID tags, comprising:

  • obtaining a used single-use first anonymous ID (identification) from a RFID tag, the RFID tag comprising a memory divided into a first rewritable portion and a second rewritable portion, wherein said used single-use first anonymous ID is stored on the first rewritable portion;

    generating a single-use second new anonymous ID different from said used single-use first anonymous ID; and

    determining if contents of said first rewritable portion and said second rewritable portion agree;

    wherein, if said contents agree;

    using either contents of said first rewritable portion or contents of said second rewritable portion to lookup a subject'"'"'s record in a database,unlinking said used single-use anonymous ID from the RFID tag after reading the used single-use first anonymous ID when said single-use second new anonymous ID is generated, andwriting said single-use second new anonymous ID to said second rewritable portion of said memory of said RFID tag; and

    wherein if said contents disagree;

    individually using contents of said first rewritable portion and contents of said second rewritable portion to lookup said subject'"'"'s record in said database, andwriting said single-use second new anonymous ID to one of said first rewritable portion and said second rewritable portion having bad data stored thereon.

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