发明名称 |
Backup Management Device, Backup Management Method, Computer Program, Recording Medium, Integrated Circuit, and Backup System |
摘要 |
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 100, a first information storage unit 102 stores a content, a second information storage unit 103 stores a backup of the content, a secure storage unit 104 stores a hash value of the content. If receiving an instruction to delete the content so as to be restorable, a control unit 113 deletes the content from the first information storage unit 102. When the content is played back, an encryption processing unit 109 applies a calculation to the content to generate detection information, and the control unit 113 compares the hash value with the detection information to judge whether the content has been tampered.
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申请公布号 |
US2008310628(A1) |
申请公布日期 |
2008.12.18 |
申请号 |
US20060795958 |
申请日期 |
2006.01.30 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
发明人 |
FUJIOKA SOICHIRO;HARADA SHUNJI;ITO YOSHIKATSU;TSUSAKA YUKO;OHMORI MOTOJI;NAKANO TOSHIHISA |
分类号 |
G06F12/14;G06F12/00;G06F13/00;G06F21/10;G06F21/60;G06F21/62;G09C1/00;H04L9/14;H04N7/167 |
主分类号 |
G06F12/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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