发明名称 |
COPYRIGHT PROTECTION SYSTEM |
摘要 |
In the present invention, apparatuses are classified into a plurality of categories, and based on a media key and device key data held by apparatuses belonging to the respective categories, revocation data intended for revoking the device key held by a specific apparatus of the respective categories is generated for the respective categories, and recorded on a recording medium. |
申请公布号 |
EP1653653(A4) |
申请公布日期 |
2011.03.09 |
申请号 |
EP20040771306 |
申请日期 |
2004.07.30 |
申请人 |
PANASONIC CORPORATION |
发明人 |
YAMAMOTO, NAOKI;ISHIHARA, HIDESHI;TATEBAYASHI, MAKOTO;NAKANO, TOSHIHISA |
分类号 |
G11B20/00;H04L9/08;H04N5/00;H04N5/85;H04N5/913;H04N7/16 |
主分类号 |
G11B20/00 |
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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