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:
Mar. 08, 2011
Filed:
Oct. 26, 2006
Masayuki Yoshino, Yokohama, JP;
Katsuyuki Okeya, Sagamihara, JP;
Camille Vuillaume, Kawasaki, JP;
Renesas Electronics Corporation, Kanagawa, JP;
Abstract
A modular multiplication processing apparatus is provided that can process modular multiplication of data exceeding a bit length which a coprocessor can process, by using the coprocessor based upon Montgomery multiplication In the modular multiplication processing apparatus, data to be subjected to modular multiplication is decomposed, and the decomposed data elements are transformed into a form suitable for Montgomery multiplication, respectively. Further, after respective data elements are transformed to have sizes that can be inputted into a coprocessor, Montgomery multiplication is repeatedly performed in the coprocessor. A remainder of Montgomery multiplication of an original bit length is restored from the obtained remainder.