Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-02-25
1997-02-11
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 23, 380 25, 380 28, 380 30, 380 44, 380 46, 380 49, 235380, H04L 908, H04L 900
Patent
active
056029152
ABSTRACT:
A process for controlling communication between a first and a second smart card using key-based cryptography is provided. In the disclosed process, a first identity code is stored in the first smart card and a second identity code is stored in the second smart card. The smart cards are customized by writing into each of the smart cards an identical group secret key and respective algorithms for processing the identical group secret key and the first and second identity codes stored in the first and second smart cards, respectively. The smart cards are used by transmitting the first identity code to the second smart card, transmitting the second identity code to the first smart card, and calculating using the respective processing algorithms stored in the smart cards, first and second session keys for the first and second smart cards, respectively.
REFERENCES:
patent: 5014312 (1991-05-01), Lisimaque et al.
patent: 5227613 (1993-07-01), Takagi et al.
patent: 5307411 (1994-04-01), Anvret et al.
patent: 5428684 (1995-06-01), Akiyama et al.
patent: 5461217 (1995-10-01), Claus
Arditti David
Campana Mireille
Gilbert Henri
France Telecom Establissement Autonome de Droit Public
Gregory Bernarr E.
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