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METHOD AND APPARATUS FOR TRIGGERING EXPIRATION OF A DATA TAG DEVICE

  • US 20090276790A1
  • Filed: 04/30/2008
  • Published: 11/05/2009
  • Est. Priority Date: 04/30/2008
  • Status: Active Grant
First Claim
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1. A method of triggering self-expiration of an active data tag device, comprising:

  • initiating a clock in the active data tag device, the clock having a clock value which changes with time;

    comparing the clock value to an expiration value;

    providing access to tag data stored in the active data tag device, via an interface, while the clock value has not reached the expiration value; and

    disabling access to at least a portion of the tag data when the clock value reaches the expiration value.

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