Method and means for limiting adverse use of counterfeit credit

Details Method and means for limiting adverse use of counterfeit credit Method and means for limiting adverse use of counterfeit credit

1996-10-08

1999-11-23

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 380 25, 380 49, 235379, 235380, 34082531, 34082534, 705 26, 705 35, 705 39, 705 44, H04L 932, H04L 900, G06K 500, G07F 708

Patent

active

059914114

ABSTRACT:
A system for rejecting second and subsequent copies of an informationally-equivalent card or badge asserted into a client/server system by processing only those cards having transaction histories recorded thereon by comparison matching a history recorded in a central repository and then rewriting the history on the card and in the repository. The rewritten histories include the current transaction. Counterfeit cards, informationally equivalent to the original card prior to the transaction update of the original card, will be rejected when asserted into the system since their histories mismatch that recorded in the repository.

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patent: 5317636 (1994-05-01), Vizcaino
patent: 5613001 (1997-03-01), Bakhoum
patent: 5742684 (1998-04-01), Labaton et al.

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