Patent ID: 9722773
Date: 2017-08-01
CPC Classifications: H04L

Claim:
1. A data masking method, implemented by an electronic circuit, which determines a representation of a product of a first item of data and a second item of data of a finite set with cardinality strictly greater than two and in which are defined an addition and a multiplication that is commutative and distributive with respect to that addition, comprising: masking the first item of data to generate a plurality of d first values of which the sum is equal to the first item of data and which are each associated with an integer comprised between 1 and d, the second item of data being represented by a plurality of d second values of which the sum is equal to the second item of data and which are each associated with an integer comprised between 1 and d, comprising the following steps: wherein the first item of data is masked from an observer of the electronic circuit, such that it is difficult or impossible for the observer to deduce the first item of data.