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:
May. 11, 2010
Filed:
Mar. 04, 2003
Yoshihiro Hori, Gifu, JP;
Ryoji Ohno, Osaka, JP;
Takeo Ohishi, Yokohama, JP;
Akihiro Tozaki, Tokorozawa, JP;
Kenichiro Tada, Tokorozawa, JP;
Tatsuya Hirai, Kawasaki, JP;
Masafumi Tsuru, Tokyo, JP;
Takayuki Hasebe, Kawasaki, JP;
Yoshihiro Hori, Gifu, JP;
Ryoji Ohno, Osaka, JP;
Takeo Ohishi, Yokohama, JP;
Akihiro Tozaki, Tokorozawa, JP;
Kenichiro Tada, Tokorozawa, JP;
Tatsuya Hirai, Kawasaki, JP;
Masafumi Tsuru, Tokyo, JP;
Takayuki Hasebe, Kawasaki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Victor Company of Japan, Kanagawa, JP;
Pioneer Corporation, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A controller in a hard disk serving as a data storage device stores a license including a content key for decrypting encrypted content data E and others in a secure data storage portion. The license is managed in the secure data storage portion in accordance with a LBA, and the LBA for storing the license, which is being processed for transmission, is stored as a log in a log memory of the secure data storage portion. When a failure occurs during the transmission processing, the license, which was being processed for transmission, is specified based on the LBA stored in the log memory.