发明名称 |
System, method and apparatus for playback of digital content |
摘要 |
In order to share content possessed by each user among a plurality of users who hold a token of encrypted content, a content playback system includes a playback requesting apparatus which holds a token and which requests the playback of the encrypted content, and a temporary playback apparatus for performing the playback of the encrypted content in response to a playback request of the content. The temporary playback apparatus transmits a token sending request in a form in which an identifier of the content and a digital signature are attached. The playback requesting apparatus sends back the token to the temporary playback apparatus only when the authentication procedure for a digital signature is successful. <IMAGE> |
申请公布号 |
EP1128250(A2) |
申请公布日期 |
2001.08.29 |
申请号 |
EP20010301478 |
申请日期 |
2001.02.20 |
申请人 |
SONY CORPORATION |
发明人 |
TERAO, HAJIMU;KURIHARA, KEN |
分类号 |
G06F21/00;G06F21/10;G06F21/33;G06F21/34;G09C1/00;G10K15/02;G10L19/00;G10L25/51;G11B20/10;H04L9/10;H04L29/06;H04N7/08;H04N7/081;H04N7/167;H04N21/441;H04N21/4623 |
主分类号 |
G06F21/00 |
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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