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:
Dec. 09, 2025
Filed:
Dec. 15, 2022
Thales Dis France Sas, Meudon, FR;
THALES DIS FRANCE SAS, Meudon, FR;
Abstract
Provided is a method to secure against side channel attacks performing a cryptographic operation of a cryptographic algorithm. It includes selecting a multiplier integer t and determining a second integer q' by multiplying said first integer q, determining (S) an invertible random polynomial R[X] in said first polynomial ring R, randomizing (S) the coefficients Ai of said input polynomial A[X] based on said determined second integer q′ and said determined random polynomial R[X], performing (S) the polynomial operation of the cryptographic operation on said randomized input polynomials A″[X], and unmasking (S) the result polynomial Res″(X) by applying to its coefficients a modulo said first integer q operation. Other embodiments disclosed.