Method for generating pseudorandom numbers and a method for...

G - Physics – 06 – F

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G06F 7/58 (2006.01) G06F 7/72 (2006.01) H04L 9/22 (2006.01) H04L 9/32 (2006.01)

Patent

CA 2381937

The invention relates to a method for generating pseudo random numbers and a method for electronic signatures. According to the inventive method for generating pseudo random numbers, points are determined on at least two different elliptical curves. A pseudo random number is produced respectively by linking the points. The linking of points of different elliptical curves to generate a pseudo random number makes it impossible to deduce the individual elliptical curves on the basis of the pseudo random numbers. The cryptographic security of the inventive method is thus tremendously increased because the computation of discrete logarithms is made impossible.

L'invention concerne un procédé destiné à générer des nombres pseudo-aléatoires et un procédé de signature électronique. Le procédé selon l'invention destiné à générer des nombres pseudo-aléatoires consiste à déterminer des points sur au moins deux courbes elliptiques différentes, et à créer à chaque fois un nombre pseudo-aléatoire par association des points. L'association des points de différentes courbes elliptiques en un nombre pseudo-aléatoire ne permet pas de déduire les courbes elliptiques individuelles à partir des nombres pseudo-aléatoires ainsi créés, par conséquent, la sécurité cryptographique du procédé selon l'invention est augmentée de manière considérable, étant donné que le calcul de logarithmes discrets est rendu impossible.

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