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Mechanism for storing authenticity information about a written or printed document

  • US 7,357,333 B2
  • Filed: 05/10/2005
  • Issued: 04/15/2008
  • Est. Priority Date: 05/10/2005
  • Status: Expired due to Fees
First Claim
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1. A method for verifying authenticity of a physical document, the method comprising:

  • examining a handwritten signature in the physical document formed in patterned electronic ink;

    extracting a microscopic pattern embedded in the handwritten signature formed in the patterned electronic ink;

    obtaining information associated with the extracted microscopic pattern from a database; and

    verifying the authenticity of the handwritten signature in the physical document using the information obtained from the database;

    wherein the pattern embedded in the handwritten signature is visible to a user only under magnification.

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