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METHOD AND APPARATUS FOR USING DYNAMIC VOLTAGE AND FREQUENCY SCALING WITH CIRCUIT-DELAY BASED INTEGRATED CIRCUIT IDENTIFICATION

  • US 20140201851A1
  • Filed: 01/16/2013
  • Published: 07/17/2014
  • Est. Priority Date: 01/16/2013
  • Status: Active Grant
First Claim
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1. A method operational within an electronic device, comprising:

  • implementing a Physical Unclonable Function (PUF) circuit;

    obtaining a first set of output bits from the PUF circuit by operating the PUF circuit at a first supply voltage level and/or first frequency;

    changing at least one of the first supply voltage level to a second supply voltage level and/or the first frequency to a second frequency, the second supply voltage level different than the first supply voltage level and the second frequency different than the first frequency;

    obtaining a second set of output bits by operating the PUF circuit at the second supply voltage level and/or the second frequency, the second set of output bits at least in part different than the first set of output bits; and

    generating secure data using at least a portion of the first set of output bits and at least a portion of the second set of output bits.

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