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Contact-less tag with signature, and applications thereof

  • US 10,726,385 B2
  • Filed: 11/12/2014
  • Issued: 07/28/2020
  • Est. Priority Date: 12/20/2007
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • assigning, by a centralized entity, a common key and an unencrypted common identifier for a plurality of tags;

    generating, by the centralized entity, a plurality of scrambling codes for the plurality of tags;

    generating, by the centralized entity, a plurality of signatures for the plurality of tag, comprising;

    for each of the plurality of tags, encrypting the unencrypted common identifier and a corresponding scrambling code with the common key; and

    loading the plurality of tags with the plurality of signatures, respectively,wherein the plurality of signatures appear scrambled relative to each other at a first time instance.

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