Method and apparatus for image-based validations of printed docu

Details Method and apparatus for image-based validations of printed docu Method and apparatus for image-based validations of printed docu

1995-02-23

1997-09-30

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 9, 380 23, 380 24, 380 30, 380 49, 380 50, 380 54, 283 17, 283 57, 283 58, 283 59, 283 73, H04L 900

Patent

active

056733208

ABSTRACT:
Multiple validations of printed documents incorporating image information and authorizing data on a printed document assist in the printed document validation process. This technique requires the authorized document holder to have an image identification accompany the application or production of the document. Image information is converted to a storable image that is used in one of a plurality of validating schemes that assures that the presenter of the printed document is not a substitute. Such schemes included visual comparison of the printed document presenter and extracted image information and validation that the data has not been altered. Non-reversible encryption of the data, as it is read from the document at the document presentation site is used to formulate encoded authorization data that is then compared against like encoded authorized document holder data stored at a centrally located data base.

REFERENCES:
patent: 3569619 (1971-03-01), Simjian
patent: 4879747 (1989-11-01), Leighton et al.
patent: 4908861 (1990-03-01), Brachtl et al.
patent: 4972476 (1990-11-01), Nathans
patent: 5157726 (1992-10-01), Merkle et al.
patent: 5321751 (1994-06-01), Ray et al.
patent: 5426700 (1995-06-01), Berson
U.S. Department of Commerce Publication FIPS PUB180, "Secure Hash Standard", issued May 11, 1993, (category: Computer Security).

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