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:
Feb. 19, 2019
Filed:
Feb. 29, 2016
Stmicroelectronics (Rousset) Sas, Rousset, FR;
Yannick Teglia, Belcodene, FR;
STMICROELECTRONICS (ROUSSET) SAS, Rousset, FR;
Abstract
A method of verifying the sensitivity of an electronic circuit executing a modular exponentiation calculation in a first register and a second register, successively including, for each bit of the exponent: a first step of multiplying the content of one of the registers, selected from among the first register and the second register according to the state of the bit of the exponent, by the content of the other one of the first and second registers, placing the result in said one of the registers; a second step of squaring the content of said other one of the registers by placing the result in this other register, wherein the content of that of the first and second registers which contains the multiplier of the operation of the first step is disturbed, for each bit of the exponent, during the execution of the first step.