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Layered security in digital watermarking

  • US 8,190,901 B2
  • Filed: 05/29/2003
  • Issued: 05/29/2012
  • Est. Priority Date: 05/29/2002
  • Status: Expired due to Fees
First Claim
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1. A method for creating an identification credential having a biometric image, comprising:

  • identifying a feature of the biometric image;

    generating a rectangular digital watermark signal tile; and

    embedding the digital watermark signal in the biometric image such that a location of a corner of the digital watermark signal tile is based at least in part on a location of the identified feature.

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