×

Document certification and authentication system

  • US 20100067691A1
  • Filed: 04/25/2008
  • Published: 03/18/2010
  • Est. Priority Date: 04/25/2008
  • Status: Active Grant
First Claim
Patent Images

1. A method for using the grain structure of a paper and user-specified information to safeguard the integrity of machine-printed paper documents, comprising:

  • imaging said paper to extract a paper grain image;

    determining a characteristic signature for said paper from said paper grain image;

    entangling said characteristic signature with said user-specified information using a predetermined sequence of private and public key encryption steps into a machine readable image to form a signet;

    printing said signet on said paper;

    locating and extracting said signet within said paper;

    decrypting and disentangling said user-specified information and said characteristic signature of said paper for which said extracted signet was originally created;

    imaging said paper for authentication;

    determining a characteristic signature for said paper;

    comparing said characteristic signature for said paper with said disentangled characteristic signature from said signet;

    determining the originality of said paper.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×