Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1993-04-26
1995-05-30
Swann, Tod R.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, 380 50, 235380, 34082534, H04K 100
Patent
active
054209242
ABSTRACT:
An identification card and method and apparatus for producing and authenticating such an identification card. An object or other entity for which the identification card will evidence identity, status or characteristics is scanned to produce a digital signal a portion of which is compressed, encrypted, and coded and which is recorded on a magnetic strip on the identification card. The image is also printed or otherwise embodied onto another portion of the identification card. A text message maybe appended to the signal before it is encrypted and also printed as plain text on the identification card. 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 tome to increase security. To facilitate authentication the corresponding decryption key is encrypted with another key and incorporated on the card. To validate the card the coded message is scanned, decoded, decrypted, expanded and displayed. The card may then be authenticated by comparison of the displayed representation stroboscopically superimposed on the image and the displayed text message with the image and text message printed on the card.
REFERENCES:
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patent: 5241600 (1993-08-01), Hillis
Berson William
Kumar Shailendra
Pitney Bowes Inc.
Scolnick Melvin J.
Swann Tod R.
Whisker Robert H.
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