H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/14 (2006.01) G06F 7/00 (2006.01) H04L 9/06 (2006.01)
Patent
CA 2332529
Improved encryption protocol for countering attacks based on the analysis of current consumption during execution of DES or analogous. According to the invention, a message (M) is processed by two entities (A and B) and entity (B) susceptible to attack executes a chain of DES operations in which a choice is made to execute a given operation (O1, O2, O3 ... On) or the same operation complemented (~1,~2,~3,...~n), the choice being random.
Protocole cryptographique perfectionné permettant de s'opposer aux attaques fondées sur l'analyse de la consommation de courant pendant l'exécution d'un DES ou analogue. Selon l'invention, un message (M) est traité par deux entités (A et B) et l'entité (B) susceptible d'attaque exécute une chaîne d'opérations dite DES dans laquelle on choisit d'effectuer une opération donnée (O1, O2, O3 ... On) ou la même opération complémentée (~1,~2,~3,...~n), le choix étant aléatoire.
Akkar Mehdi-Laurent
Dischamp Paul
Oberthur Card Systems Sa
Robic
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