发明名称 |
DISTRIBUTION SYSTEM, DISTRIBUTION SERVER, RECEIVER, DISTRIBUTION PROGRAM, AND RECEPTION PROGRAM |
摘要 |
PROBLEM TO BE SOLVED: To efficiently control the viewing of content by using key information. SOLUTION: A distribution system comprises a distribution server for enciphering the content for distributing to a receiver, and a receiver for performing decoding by a decoding key to output the content. The distribution server comprises a key seed generation means for generating a key seed that enciphers an encipher key, where the content is enciphered; a secret key generation means for generating a secret key based on the key seed information; a key enciphering means for enciphering the encipher key or a secret key by the key seed; and a header generation means for generating header information based on the key information enciphered by the key enciphering means, and the identification information of the content or the identification information of a user. The receiver has a decoding key acquisition means for acquiring a decoding key for decoding the content based on the header information and the secret key stored in advance. COPYRIGHT: (C)2006,JPO&NCIPI
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申请公布号 |
JP2006173733(A) |
申请公布日期 |
2006.06.29 |
申请号 |
JP20040359831 |
申请日期 |
2004.12.13 |
申请人 |
NIPPON HOSO KYOKAI <NHK> |
发明人 |
OGAWA KAZUTO;NISHIMOTO TOMONARI;BABA AKITSUGU |
分类号 |
H04L9/08 |
主分类号 |
H04L9/08 |
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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