Access control to data processing means

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United States of America Patent

PATENT NO 8583934
APP PUB NO 20030188170A1
SERIAL NO

10311698

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Abstract

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A method for preventing secret code manipulation in a data processing device, such as a smart card, to which a presented code is applied. Prior to implementation of a code transforming function in the processing device, the secret code is transformed into a transformed secret code in the card. For each use of the card, the presented code is transformed into a transformed presented code in accordance with the implemented transformation function. A comparison of the transformed secret code with the transformed secret code in the card is then performed.

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Patent Owner(s)

  • GEMALTO SA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bidan, Christophe Thorigne-Fouillard, FR 6 78
Girard, Pierre La Destrousse, FR 37 698
Guterman, Pascal Roquevaire, FR 8 68
Naccache, David Paris, FR 106 1149
Rousseau, Ludovic Aubagne, FR 3 70

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