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. 12, 2003
Filed:
Aug. 04, 1998
Makoto Aikawa, Yokohama, JP;
Kazuo Takaragi, Ebina, JP;
Hiroyuki Koreeda, Fujisawa, JP;
Manabu Sasamoto, Yokohama, JP;
Hiroo Okamoto, Yokohama, JP;
Takaharu Noguchi, Yokohama, JP;
Soichi Furuya, Fukuoka, JP;
Shigeru Hirahata, Kanagawa-ken, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Encrypting/decrypting conversion method and apparatus capable of controlling dynamically cyclic shift independent of data to undergo encrypting/decrypting conversion includes two or more different fixed circulating shift processing means for shifting cyclically the data by a fixed bit number leftward or rightward, a cyclic shift processing selecting means for selecting fixed cyclic shift processing means. The selecting sequence determined by the cyclic shift processing means is determined on the basis of data for determining the shift number selecting sequence.