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Deterrence of device counterfeiting, cloning, and subversion by substitution using hardware fingerprinting

  • US 8,848,905 B1
  • Filed: 07/28/2010
  • Issued: 09/30/2014
  • Est. Priority Date: 07/28/2010
  • Status: Active Grant
First Claim
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1. A computing device, comprising:

  • a hardware platform;

    device circuitry coupled to perform a primary function of the computing device disposed in or on the hardware platform; and

    a cryptographic fingerprint unit coupled to authenticate the hardware platform including;

    a physically unclonable function (“

    PUF”

    ) circuit disposed in or on the hardware platform, the PUF circuit coupled to output a PUF value;

    a plurality of programmable PUF perturbation devices coupled to one or more signal paths within the PUF circuit or disposed adjacent to the one or more signal paths, wherein the programmable PUF perturbation devices influence delays associated with the one or more signal paths based on a programmed state of the PUF perturbation devices;

    a key generator coupled to generate a private key and a public key based on the PUF value; and

    a decryptor coupled to receive an authentication challenge posed to the computing device and encrypted with the public key and coupled to output a response to the authentication challenge decrypted with the private key.

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