IC card system for preventing unauthorized data alteration

Details IC card system for preventing unauthorized data alteration IC card system for preventing unauthorized data alteration

1988-04-06

1991-04-23

Trafton, David

Registers

Systems controlled by data bearing records

Banking systems

235441, 235492, G06F 1530

Patent

active

050102370

ABSTRACT:
An IC card internally stores two different PINs. Collation of these PINs sets the IC card having an internal data memory in different characterizing statuses. When coincidence occurs at the first PIN collation, data input to the data memory of the card is permitted. When coincidence occurs at the second PIN collation, data transfer is permitted. Accordingly, when important data is stored in the IC card and a plurality of persons handle the IC card, the data stored in the IC card can be prevented from being altered unauthorized.

REFERENCES:
patent: 4211919 (1980-07-01), Ugon
patent: 4614861 (1986-09-01), Pavlov et al.
patent: 4816653 (1989-03-01), Anderl et al.
IBM Technical Disclosure Bulletin, vol. 30, No. 3, Aug. 3, 1987, pp. 1262-1265, Armonk, N.Y., U.S.; "Personal transaction card".

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