Microcomputer PC-cards

Details Microcomputer PC-cards Microcomputer PC-cards

1992-12-21

1999-02-23

Bowler, Alyssa H.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

380 3, 380 4, 395186, G06F 1214

Patent

active

058754806

ABSTRACT:
The invention relates to exchangeable memory or PC-cards with several integrated circuits for personal computers. These PC-cards are used as a large capacity mass memory for replacing floppy disks and other exchangeable magnetic supports. To protect the content of these PC-cards against unauthorized use, the invention proposes the incorporation into the card (CC) of a specific security integrated circuit chip (MPS), which performs a clearance function for access to the memory chips (MEM). A microcontroller (MPC) also placed in the card comnunicates with the computer and with the security circuit. It makes the security chip validate a confidential code introduced from the computer, whilst also supplying memory chip control signals as a function of the validation result.

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Terry, "Smart Cards yield high memory capacities for mass-storage and data-security uses", EDN, Oct. 1987, pp. 61, 63-64, 67.

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