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Knowledge based system for document authentication (apparatus)

  • US 5,163,091 A
  • Filed: 11/16/1990
  • Issued: 11/10/1992
  • Est. Priority Date: 01/29/1990
  • Status: Expired due to Term
First Claim
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1. In a data processing system that includes a processor that serves a plurality of users at one or more data terminals and one or more data communication ports, a document authentication system comprising:

  • means for interconnecting a first user and a second user with a document stored on said processor;

    means responsive to said second user transmitting a document authentication signal to said processor for disabling both said first and said second users from modifying said document;

    means for comparing said received document authentication signal with said document to determine whether said received document authentication signal contains data that matches corresponding data in said document;

    means responsive to said comparing means determining a match between said received document authentication signal and said corresponding data in said document for authenticating said document.

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