Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-11-20
1995-02-07
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 18, 380 21, 380 30, 380 49, 380 54, H04L 932, H04L 930, H04L 908
Patent
active
053881583
ABSTRACT:
A document secure against tampering or alteration and method and apparatus for producing and authenticating such a document. A document is scanned to produce a digital signal which is compressed, encrypted, and coded as a two dimensional barcode or as some other appropriate form of coding, which is incorporated into a label which is the affixed to the document. In one embodiment the signal representing the image is encrypted using a public key encryption system and the key is downloaded from a center. This key maybe changed from time to time to increase security. To facilitate authentication the corresponding decryption key is encrypted with another key and incorporated on the card. To validate the document the coded signal is scanned from the label, decoded, decrypted, expanded and displayed. The card may then be authenticated by comparison of the displayed representation of the image and the document.
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Phototrace in Automatic I.D. News by Greg Smith Minneapolis, date unknown.
Gregory Bernarr E.
Pitney Bowes Inc.
Scolnick Melvin J.
Whisker Robert H.
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