Method and device for the checking of the number of access attem

Details Method and device for the checking of the number of access attem Method and device for the checking of the number of access attem

1982-11-10

1984-03-27

Pitts, Harold I.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235380, 235381, 2353825, G06K 500

Patent

active

044396708

ABSTRACT:
An access trial control device for a card, such as a financial or business transaction card or the like, which is inserted in an access terminal for use and carries a confidential code which is compared with an access code type by the user on the terminal. For each access trial the result, acceptance or refusal, of the comparison is permanently recorded by non volatile memory means in the card. The number of consecutive access trials refused is counted in a counter and is detected by a control circuit which disables the card when such number reaches a predetermined value. Each accepted access trial resets the counter to zero.

REFERENCES:
patent: Re30580 (1981-04-01), Goldman
patent: 3587051 (1971-06-01), Hovey
patent: 3755776 (1973-08-01), Kotras
patent: 4021796 (1977-05-01), Fawcett
patent: 4204113 (1980-05-01), Giraud
patent: 4256955 (1981-03-01), Giraud

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