Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1983-04-18
1986-05-27
Pitts, Harold I.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235381, 235382, 2353825, G06K 500
Patent
active
045917043
ABSTRACT:
Credit cards to be used with automated systems such as vending machines or the like have various identification and other data encoded on them for use with a particular system for which they are intended. To prevent persons familiar with the system operation and the manner of encoding data on such credit cards from developing unauthorized cards which will work in the system, a random number generator is used to produce a mask for relocating the bits of encoded data in a random manner to various locations on the credit card. This mask is stored in a microprocessor memory and is used both in encoding and decoding such cards.
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El-Kilani Saddah
Gregor William T.
Roth Richard W.
Sherwood Michael D.
Snyder Kenneth D.
Engineered Systems Inc.
Pitts Harold I.
Ptak LaValle D.
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