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:
Aug. 26, 2014
Filed:
Nov. 27, 2012
Renesas Electronics Corporation, Kanagawa, JP;
Camille Vuillaume, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
In power residue calculation in the primality determination, in addition to the conventional randomization of an exponent, a modulus is also randomized. A random number generated by a random number generator is set to a randomizing number, and is input to a modulus generator and an exponent generator. The modulus generator and the exponent generator randomize a prime number candidate P using the randomizing number to generate a randomized modulus Rand exponent R. Using the randomized modulus Rand exponent R, the power residue calculation for primality determination is executed, and based on the result, the primality of the prime number candidate P is determined. The power consumption during the primality determination of a semiconductor device becomes noncorrelated with a value of a prime number candidate to be determined, and the leakage of a prime number due to side channel attacks can be prevented.