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Security based on subliminal and supraliminal channels for data objects

  • US 7,127,615 B2
  • Filed: 09/20/2001
  • Issued: 10/24/2006
  • Est. Priority Date: 09/20/2000
  • Status: Active Grant
First Claim
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1. A method for protecting a data signal comprising:

  • providing an original data signal to be encoded;

    predetermining a perceptibility threshold for said encoding;

    predeterminig at least one dependency between a first set of independent data and a second set of independent data;

    using a first cryptographic key to encode the first set of independent data into the data signal imperceptibly below the perceptibility threshold; and

    using a second cryptographic key to encode the second set of independent data into the data signal perceptibly above the perceptibility threshold.

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