Authentication method and system

  • US 9,818,249 B1
  • Filed: 01/29/2016
  • Issued: 11/14/2017
  • Est. Priority Date: 09/04/2002
  • Status: Active Grant
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First Claim
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1. An authentication method, comprising:

  • receiving an object to be authenticated, the object having an object-specific associated cryptographic hash code selectively dependent on a plurality of observable non-deterministic characteristics and an index code associated with an identity of the object, the cryptographic hash code comprising an error correcting code providing a tolerance to a predetermined deviation of states of the plurality of observable non-deterministic characteristics at different times;

    obtaining an image of the cryptographic hash code and the plurality of observable non-deterministic characteristics through a common imaging system under light emitting diode illumination;

    processing the obtained image of the plurality of observable non-deterministic characteristics to representing a normalized set of non-deterministic characteristics and the index code;

    cryptographically processing the normalized set of non-deterministic characteristics and the index code, at a time after the cryptographic hash code is defined, and wherein the plurality of observable non-deterministic characteristics are different from a respective state at the time the cryptographic hash code is defined, to determine a correspondence between the cryptographic hash code and the plurality of observable non-deterministic characteristics, according to a statistical process tolerant to at least one of loss of at least one of the plurality of observable non-deterministic characteristics, noise, contamination, and interference, to determine an identity of the object and a likelihood that object is authentic with respect to the object-specific associated cryptographic code.

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