Patent ID: 9729323
Date: 2017-08-08
CPC Classifications: G06F,H04L

Claim:
1. A method of cryptographic processing of data, the method being executed by an electronic device comprising a memory and at least one hardware processor coupled to said memory, the method comprising obtaining at least two points represented in an affine coordinate system, and denoted respectively P 1 =(x 1 , y 1 ) and P 2 =(X 2 , y 2 ) belonging to a same elliptic curve defined on an algebraic structure being a finite ring, wherein the method further comprises: obtaining a parameterization of an isomorphism ψ between said elliptic curve, denoted as E determining said configuration parameters as a function of values of coordinates of said at least two points, delivering determined configuration parameters, wherein u=x obtaining coordinates of another point denoted Q corresponding to an image of an addition of said at least two points through said isomorphism, said another point belonging to said another elliptic curve, and said obtaining being performed without an inversion operation in said algebraic structure, due to said determined configuration parameters, wherein Q=ψ(P