System for authenticating an authorized user of an IC card

Details System for authenticating an authorized user of an IC card System for authenticating an authorized user of an IC card

1990-11-28

1992-09-08

Trafton, David

Registers

Coded record sensors

Particular sensor structure

235379, 235436, 235492, G06K 706

Patent

active

051460688

ABSTRACT:
An IC card which has a timer circuit that shuts off the IC card within a predetermined time interval is used with a terminal which resets the timer circuit in the IC card in response to any terminal operations. This prevents the IC card from shutting itself off during the terminal operations.

REFERENCES:
patent: 4105156 (1978-08-01), Dethloff
patent: 4590365 (1986-05-01), Okada
patent: 4839506 (1989-06-01), Homma et al.
patent: 4851653 (1989-07-01), Limisaque et al.
patent: 4879455 (1989-11-01), Butterworth et al.

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