Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1993-06-01
1994-09-13
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 380 23, 380 29, 380 30, 380 49, 235379, 235380, 34082531, 34082534, H04L 932
Patent
active
053475801
ABSTRACT:
This invention relates to a novel smartcard-based authentication technique using a smartcard that encrypts the time displayed on the card with a secret, cryptographically strong key. The (public) work station receives as input certain values defining the user, the card and a particular value derived from the encrypted time and encrypts and/or transmits these values to the server. The server, in turn, computes from received values some potential values and compares these to other received values. If the server determines a match, an accept signal is transmitted to the work station.
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patent: 5237614 (1993-08-01), Weiss
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Molva Refik
Tsudik Gene
Gregory Bernarr E.
International Business Machines - Corporation
Tennent A. P.
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