PROCEDE DE CHIFFREMENT PROTEGE CONTRE DES ATTAQUES PAR CANAUX AUXILIAIRES

The invention relates to a symmetric encryption process executed by a microcircuit to transform a message into an encrypted message from a secret key, the process including a first round, intermediary rounds, and a last round. According to the invention, the process includes several executions of th...

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Bibliographic Details
Main Authors ROUSSELLET MYLENE, FEIX BENOIT
Format Patent
LanguageFrench
Published 21.11.2014
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:The invention relates to a symmetric encryption process executed by a microcircuit to transform a message into an encrypted message from a secret key, the process including a first round, intermediary rounds, and a last round. According to the invention, the process includes several executions of the first round and of the last round, and a number of executions of at least one intermediary round, the number of executions being less than the number of executions of the first and last rounds. The invention is particularly applicable to DES, Triple DES, and AES processes.
Bibliography:Application Number: FR20120050272