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Document authentication

  • US 20050038787A1
  • Filed: 08/16/2004
  • Published: 02/17/2005
  • Est. Priority Date: 08/16/2003
  • Status: Active Grant
First Claim
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1. A method for authenticating a document comprising;

  • receiving a request to verify the earliest date of a document, such a request including the document itself;

    creating a signature of the received document by running the document against a checksum algorithm;

    searching a database for a matching signature to the created signature; and

    responding to the request with a date associated with a matched signature.

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