Peripheral device preventing post-scan modification

Details Peripheral device preventing post-scan modification Peripheral device preventing post-scan modification

1997-03-31

1999-07-20

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 23, 380 30, 380 49, 380 50, 380 51, 380 54, 380 55, H04L 900, H04L 930

Patent

active

059265507

ABSTRACT:
A scanner constructed to prevent illicit post-scan modification of a data set. The data set is a representation of visual images printed on a document scanned by the scanner. To prevent illicit post-scan modification, the scanner produces a digital signature which is output in combination with the data set. This virtually ensures detection of any post-scan modification of the data set.

REFERENCES:
patent: 5291243 (1994-03-01), Heckman et al.
patent: 5530755 (1996-06-01), Pailles et al.
patent: 5606609 (1997-02-01), Houser et al.
patent: 5721788 (1998-02-01), Powell et al.
patent: 5809160 (1998-09-01), Powell et al.

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