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. 10, 2019
Filed:
Nov. 30, 2017
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Ruggero Susella, Milan, IT;
STMICROELECTRONICS S.R.L., Agrate Brianza, IT;
Abstract
A modular reduction calculation on a first number and a second number is protected from side-channel attacks, such as timing attacks. A first intermediate modular reduction result is calculated. A value corresponding to four times the first number is added to the first intermediate modular reduction result, generating a second intermediate modular reduction result. A value corresponding to the first number multiplied by a most significant word of the second intermediate modular reduction result plus 1, is subtracted from the second intermediate modular reduction result, generating a third intermediate modular reduction result. A cryptographic operation is performed using a result of the modular reduction calculation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile