Method and system for protecting information recorded in informa

Details Method and system for protecting information recorded in informa Method and system for protecting information recorded in informa

1987-07-29

1989-02-28

Envall, Jr., Roy N.

Registers

Systems controlled by data bearing records

Credit or identification card systems

G06K 500

Patent

active

048088021

ABSTRACT:
A time limiting function is incorporated in an information carrying medium such as IC card to check whether the current time traced constantly reaches a preset limit time. When the current time reaches the limit time, information to be protected and stored in a memory is erased. For convenience of the user possessing the information carry medium, a card holder is provided which can be connected to the information carrying medium to stop the time limiting function.

REFERENCES:
patent: 4394654 (1983-07-01), Hofmann-Cerfontaine

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