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:
Jan. 30, 2007
Filed:
Jul. 09, 2003
Applicant:
Atsuo Yamaguchi, Hyogo, JP;
Inventor:
Atsuo Yamaguchi, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power-residue calculating unit includes a K register connected to a first internal bus for once storing an intermediate calculation result to be discarded when a power-residue calculation is executed in accordance with a binary method. Therefore even when data to be discarded appears during the calculation, a write into K register is performed, so that current in a write operation flows thereby improving immunity against Power Analysis.