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Anti-counterfeiting label preserving functionality after use

  • US 9,893,889 B2
  • Filed: 05/18/2015
  • Issued: 02/13/2018
  • Est. Priority Date: 05/21/2014
  • Status: Active Grant
First Claim
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1. A near field magnetically coupled contactless tag, comprising:

  • a control chip for implementing a basic function and a cryptographic function (CCP);

    a sacrificial conductive track located across a sacrificial area of the tag; and

    a circuit for detecting continuity of the sacrificial track, cooperating with the microcircuit to implement the basic function without implementing the cryptographic function when the sacrificial track is broken.

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