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Enhanced RFID tag authentication

  • US 9,940,490 B1
  • Filed: 12/13/2013
  • Issued: 04/10/2018
  • Est. Priority Date: 11/30/2011
  • Status: Active Grant
First Claim
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1. A method for a Radio Frequency Identification (RFID) system to cause an RFID tag having a first parameter to execute an instruction, the method comprising:

  • sending a first command to the tag;

    receiving from the tag at least an identifier and an encrypted version of the first parameter;

    determining a key using the received identifier;

    recovering the first parameter from the encrypted version using the key;

    sending, at a first time, to the tag a single second command including the first parameter and a tag instruction; and

    causing the tag to execute the tag instruction upon verifying the first parameter.

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