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:
Sep. 27, 2022
Filed:
Mar. 05, 2020
Applicant:
Stmicroelectronics (Rousset) Sas, Rousset, FR;
Inventors:
Ibrahima Diop, Marseilles, FR;
Yanis Linge, Fuveau, FR;
Assignee:
STMICROELECTRONICS (ROUSSET) SAS, Rousset, FR;
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2022.01); G06F 7/72 (2006.01); G06F 7/504 (2006.01); G06F 7/525 (2006.01);
U.S. Cl.
CPC ...
H04L 9/002 (2013.01); G06F 7/504 (2013.01); G06F 7/525 (2013.01); G06F 7/72 (2013.01);
Abstract
Cryptographic circuitry, in operation, performs a calculation on a first number and a second number. The performing of the calculation is protected by breaking the second number into a plurality of third numbers, a sum of values of the third numbers being equal to a value of the second number. The calculation is performed bit by bit for each rank of the third numbers. Functional circuitry, coupled to the cryptographic circuitry, uses a result of the calculation.