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:
Feb. 21, 2012
Filed:
Sep. 08, 2010
Makoto Fujiwara, Kyoto, JP;
Yusuke Nemoto, Hyogo, JP;
Junichi Yasui, Osaka, JP;
Takuji Maeda, Osaka, JP;
Takayuki Ito, Osaka, JP;
Yasushi Yamada, Aichi, JP;
Shinji Inoue, Osaka, JP;
Makoto Fujiwara, Kyoto, JP;
Yusuke Nemoto, Hyogo, JP;
Junichi Yasui, Osaka, JP;
Takuji Maeda, Osaka, JP;
Takayuki Ito, Osaka, JP;
Yasushi Yamada, Aichi, JP;
Shinji Inoue, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A secure LSI deviceincludes an encryption sectionfor encrypting a program, and an external I/Ffor inputting/outputting a program or data from/to an external memory. In the encryption section, the operation of a private key arithmetic processing sectionis prohibited with respect to a sequence whose execution is determined by a key-generation/update sequencerto be impermissible. In the external I/F, a program processing sectionand a data processing sectionare structured independently from each other.