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:
Sep. 10, 2013
Filed:
Mar. 04, 2009
Tomoko Yonemura, Kanagawa, JP;
Hirofumi Muratani, Kanagawa, JP;
Kenji Ohkuma, Kanagawa, JP;
Hanae Ikeda, Tokyo, JP;
Taichi Isogai, Tokyo, JP;
Kenichiro Furuta, Tokyo, JP;
Yoshikazu Hanatani, Tokyo, JP;
Tomoko Yonemura, Kanagawa, JP;
Hirofumi Muratani, Kanagawa, JP;
Kenji Ohkuma, Kanagawa, JP;
Hanae Ikeda, Tokyo, JP;
Taichi Isogai, Tokyo, JP;
Kenichiro Furuta, Tokyo, JP;
Yoshikazu Hanatani, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
When converting an affine representation representing a 2r-th degree algebraic torus T(F) (r is a prime number, and q is an integer) to a projective representation representing a quadratic algebraic torus T(F), a representation converting apparatus acquires member (c, c, . . . , c), (cis a member of a finite field F, where 0≦i≦r−2) of a 2r-th degree algebraic torus T(F) represented by the affine representation. The apparatus performs a multiplication operation on the acquired member. The multiplication operation is determined by a condition under which a member of a quadratic algebraic torus T(F) is included in the 2r-th degree algebraic torus T(F), a modulus and a base of a quadratic extension, and a modulus and a base of an r-th degree extension. The representation converting apparatus then performs an addition and subtraction operation determined by the condition, the moduli, and the bases.