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Self validating security documents utilizing watermarks

  • US 20020061120A1
  • Filed: 11/09/2001
  • Published: 05/23/2002
  • Est. Priority Date: 08/09/1995
  • Status: Active Grant
First Claim
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1. A self validating security document that has multiple fields of indicia including a field with a hidden digital watermark carrying hidden data, such that comparison of the hidden data with automatically read physical characteristics of the user can validate the document.

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