Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1991-06-11
1993-06-08
Cain, David
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, H04K 100
Patent
active
052186377
ABSTRACT:
According to the invention, the chip card issues a first certificate comprising its letter of credentials (Crc), an exponential (X), an optional message (M), these quantities being signed. The security module verifies the signature and in return issues a second certificate containing its letter of credentials (Crm), an exponential (Y), an optional message (M'), a cryptogram (C), these quantities being signed. A common secret key is constituted between the card and the security module by the exponentials and allows the card to interpret the cryptogram addressed to it and to act in accordance therewith.
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Angebaud Didier
Giachetti Jean-Luc
Guillou Louis
Quisquater Jean-Jacques
Barschall Anne E.
Cain David
L'Etat Francais represente par le Ministre des Postes, des
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