Method for data decorrelation
AssigneeCentre National De La Recherche Scientifique
InventorSerge Vaudenay
Life of this patent
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Abstract
Method for the cryptography of data recorded on a medium usable by a computing unit in which the computing unit processes an input information x using a key for supplying an information F(x) encoded by a function F. The function uses a decorrelation module Mk such that F(x)=[F′(Mk)](x), in which K is a random key and F′ a cryptographic function. This Abstract is neither intended to define the invention disclosed in this specification nor intended to limit, in any manner, the scope of the invention.
Claims12
Method for cryptography of data stored on a medium exploitable by a computing unit in which said computing unit processes an input information x by way of a key K to provide information F(x) encoded by a function F,
- wherein the function F uses a decorrelation module Mk, of rank at least equal to two, to transform the input information such that a distribution obtained with a random variation of the key K is one of uniform and quasi uniform, and such that F(x)=[F′(Mk)](x), where F′ is a cryptographic function.
Dependencies are inferred from the claim text.