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. 02, 2011
Filed:
Jan. 30, 2006
Soichiro Fujioka, Osaka, JP;
Shunji Harada, Osaka, JP;
Yoshikatsu Ito, Osaka, JP;
Yuko Tsusaka, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Soichiro Fujioka, Osaka, JP;
Shunji Harada, Osaka, JP;
Yoshikatsu Ito, Osaka, JP;
Yuko Tsusaka, Osaka, JP;
Motoji Ohmori, Osaka, JP;
Toshihisa Nakano, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
To provide a backup management device that deletes a content so as to be restorable in the future while protecting a copyright of the content, in a case where there exists a backup of the content. In an HD recorder, a first information storage unit stores a content, a second information storage unit stores a backup of the content, a secure storage unit stores a hash value of the content. If receiving an instruction to delete the content so as to be restorable, a control unit deletes the content from the first information storage unit. When the content is played back, an encryption processing unit applies a calculation to the content to generate detection information, and the control unit compares the hash value with the detection information to judge whether the content has been tampered.