Process for exchange of rights between microprocessor cards

Details Process for exchange of rights between microprocessor cards Process for exchange of rights between microprocessor cards

1992-01-22

1993-09-21

Buczinski, Stephen C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

235379, 235380, 380 45, H04K 100, H04K 900, G06F 1530

Patent

active

052475786

ABSTRACT:
A process for exchange of rights between microprocessor cards, wherein multiple keys (K1, K2, . . . ) and varied keys (Ka5, Kb3) are used. A card to be debited calculates a voucher with varied key (Ka5) that the card to be credited reconstitutes. The process has application to electronic payment.

REFERENCES:
patent: 4529870 (1985-07-01), Chaum
patent: 4630201 (1986-12-01), White
patent: 4746788 (1988-05-01), Kawana
patent: 4792973 (1988-12-01), Gilhousen et al.
patent: 4926480 (1990-05-01), Chaum
patent: 4961142 (1990-10-01), Elliott et al.
patent: 5036461 (1991-07-01), Elliott et al.
patent: 5140634 (1992-08-01), Guillou et al.
L'Echo De's Recherches, No. 134, pp. 15-24, Oct. 1988, P. Remery, et al., "Le Paiement Electronique".

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