Method and apparatus for generating a public key in a manner...

Details Method and apparatus for generating a public key in a manner... Method and apparatus for generating a public key in a manner...

H - Electricity

04

L

H04L 9/30 (2006.01)

Patent

CA 2680045

A public key for an Elliptic Curve Cryptosystem is generated in a manner that acts as a countermeasure to power analysis attacks. In particular, a known scalar multiplication method is enhanced by, in one aspect, performing a right shift on the private key. The fixed-sequence window method includes creation and handling of a translated private key. Conveniently, as a result of the right shift, the handling of the translated private key is made easier and more efficient.

Une clé publique pour un cryptosystème à courbes elliptiques est générée d'une manière qui agit en tant que contre-mesure à des attaques par analyse de consommation. En particulier, un procédé de multiplication scalaire connu est perfectionné, sous un aspect, par la réalisation d'un décalage à droite sur la clé privée. Le procédé de fenêtrage à séquence fixe comprend la création et la manipulation d'une clé privée traduite. De façon pratique, en tant que résultat du décalage à droite, la manipulation de la clé privée traduite est rendue plus facile et plus efficace.

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