The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2025
Filed:
Jan. 11, 2022
Thales Dis France Sas, Meudon, FR;
David Vigilant, Malakoff, FR;
Steven Madec, Montigny le Bretonneux, FR;
Mylène Roussellet, Saint Savournin, FR;
THALES DIS FRANCE SAS, Meudon, FR;
Abstract
Provided is a method for securing against side channel attacks. An elliptic curve cryptographic process comprises a multiple points multiplication operation using predetermined scalar values, Pi being points of an elliptic curve over a finite field defined by parameters (F, E, G, N) together with the point addition law where F is a field over which is defined the curve, E is an equation of the curve, G is a base point in E over F and N is the order of the base point G. The method comprises generating (S) a masking value iRand, multiplicatively masking (S) each predetermined scalar value dwith said generated masking value iRand to obtain masked scalars d', computing (S) a masked multiple points multiplication operation result, and obtaining (S) said multiple points multiplication operation result R by unmasking said masked multiple points multiplication operation result R′.