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:
Jul. 02, 2013
Filed:
Apr. 27, 2007
Yuichi Futa, Osaka, JP;
Taichi Sato, Osaka, JP;
Rieko Asai, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Masahiro Mambo, Ibaraki, JP;
Yuichi Futa, Osaka, JP;
Taichi Sato, Osaka, JP;
Rieko Asai, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Masahiro Mambo, Ibaraki, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An obfuscating apparatus creates a table for inputting the same number of arguments for multiplying and squaring operations, and sets the output values of the table so that the outputs may depend on the arguments. With regard to the squaring operations, there are added and tabulated adding operations using the arguments necessary only for the multiplications, so that the number of arguments is equal to that of the multiplication operations. The outputs depend on all the arguments, so that the presence or absence of the added arguments is unknown unlike the case in which dummy arguments that are not processed are added.