Personal identification system

Details Personal identification system Personal identification system

1992-08-20

1993-10-05

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 24, 380 52, 235380, 2353825, H04K 100

Patent

active

052512592

ABSTRACT:
A group of seven (7) PINs are assigned to each card holder. The group of PINs are to be used in a specific sequence changing each calendar day. If a PIN is used out of sequence, then access to the charge or credit card is denied by the card company. A grid of numbers and letters are used to vary the PIN each day. The grid includes seven (7) rows and seven (7) columns with the numbers 1 through 7 randomly selected and placed in the seven (7) rows and columns. The rows and columns, when utilized correctly, allow the card holder to access seven three-digit codes. The codes or personal identification numbers must be used in the correct sequence which is determined by the number of uses per calendar day.

REFERENCES:
patent: 4449040 (1984-05-01), Matsuoka et al.
patent: 4510382 (1985-04-01), Walter
patent: 4528442 (1985-07-01), Endo
patent: 4727975 (1988-03-01), Eisermann
patent: 4766294 (1988-08-01), Nara et al.
patent: 4800590 (1989-01-01), Vaughan
patent: 4962530 (1990-10-01), Cairns
patent: 5034597 (1991-07-01), Atsumi et al.
patent: 5177789 (1993-01-01), Covert

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