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Optical DNA

  • US 8,788,848 B2
  • Filed: 03/22/2007
  • Issued: 07/22/2014
  • Est. Priority Date: 03/22/2007
  • Status: Active Grant
First Claim
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1. A system comprising:

  • an examination component configured to;

    receive intrinsic error data for an optical media instance that has a plurality of extant manufacturing errors, wherein the plurality of extant manufacturing errors cause illegal codewords to be read from the optical media instance and the intrinsic error data identifies positions where the illegal codewords are read from the optical media instance; and

    construct an error fingerprint of the optical media instance by encoding at least some of the positions where the illegal codewords are read from the optical media instance, the error fingerprint being constructed using an error model reflecting probabilities of reading the illegal codewords from the optical media instance;

    an issuing component configured to generate a signature for the optical media instance based at least in part upon the error fingerprint constructed using the error model, the error fingerprint serving as a certificate of authenticity of the optical media instance when verified or vouched for by the signature;

    an impression component configured to embed, in the optical media instance, the signature that is based at least in part upon the error fingerprint constructed using the error model; and

    one or more hardware processors configured to implement the examination component, the issuing component, and the impression component,wherein, to generate the signature, the issuing component is further configured to;

    concatenate the error fingerprint with a tag to obtain a concatenation of the error fingerprint and the tag, andcryptographically sign a hash of the concatenation of the error fingerprint and the tag.

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