发明名称 |
CONTENT DISTRIBUTION SYSTEM AND DISTRIBUTION METHOD, AND CONTENT PROCESSING DEVICE AND PROCESSING METHOD |
摘要 |
In a content delivery system including a server and content processing apparatus connected to each other across a network, a content delivered by the system is encrypted with a content key Kc, and supplied along with a sublicense encrypted with a work key Kw to a DTV. The sublicense includes a second use condition under which a content is used and a content key Kc for decrypting an encrypted content. The work key Kw for decrypting an encrypted content is included in a main license. The main license is supplied to the DTV separately from the content. The main license includes, in addition to the work key Kw, a first use condition under which a content under a subscription contract is used. |
申请公布号 |
EP1691551(A4) |
申请公布日期 |
2010.09.22 |
申请号 |
EP20040820519 |
申请日期 |
2004.12.06 |
申请人 |
SONY CORPORATION;PANASONIC CORPORATION |
发明人 |
KITAZATO, NAOHISA;DEWA, YOSHIHARU;KATAYAMA, YASUSHI;SHIMOJI, TATSUYA;KAGEMOTO, HIDEKI;TOKUDA, KATSUMI;MURAKAMI, HIROKI |
分类号 |
G06F12/14;G06F21/00;G06Q30/00;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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