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:
Apr. 13, 2021
Filed:
Jul. 20, 2018
Applicant:
Stmicroelectronics (Rousset) Sas, Rousset, FR;
Inventors:
Assignee:
STMICROELECTRONICS (ROUSSET) SAS, Rousset, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/00 (2013.01); G06F 21/55 (2013.01); G06F 21/60 (2013.01); G06F 7/72 (2006.01); H04L 9/00 (2006.01); G06F 21/72 (2013.01);
U.S. Cl.
CPC ...
G06F 21/556 (2013.01); G06F 7/723 (2013.01); G06F 21/606 (2013.01); G06F 21/72 (2013.01); H04L 9/002 (2013.01); G06F 2207/7257 (2013.01); H04L 2209/08 (2013.01);
Abstract
An iterative calculation is performed on a first number and a second number, while protecting the iterative calculation against side-channel attacks. For each bit of the second number, successively, an iterative calculation routine of the bit of the second number is determined. The determination is made independent of a state of the bit. The determined iterative calculation routine of the bit is executed. A result of the iterative calculation is generated based on a result of the execution of the determined iterative calculation routine of a last bit of the second number.