G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 12/14 (2006.01) G06K 19/077 (2006.01) G07F 7/10 (2006.01) H04L 9/06 (2006.01)
Patent
CA 2234478
A method, a logic machine and a circuit for producing an authentication code (CA), in particular for authenticating smart cards. The method comprises a cycle of steps wherein a bit word is read out of a secret memory (21) comprising a plurality of bit words, and words read out during previous cycles are combined. The result of the combination is used as a generator word (GA) for generating the address of the word to be read out in the next cycle.
La présente invention concerne un procédé, une machine logique et un circuit pour produire un code d'authentification (CA), notamment pour l'authentification des cartes à mémoire. Le procédé de l'invention comprend de façon cyclique les étapes consistant à lire un mot binaire dans une mémoire secrète (21) comportant une pluralité de mots binaires, et combiner des mots lus au cours des cycles précédents. Le résultat de la combinaison est utilisé comme mot générateur (GA) de l'adresse du mot à lire au cycle suivant.
Goudreau Gage Dubuc
Inside Technologies
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