发明名称 |
Contents distribution system |
摘要 |
A contents supply apparatus supplies sub-content that relates to main content. A DVD-ROM stores a bind key unique to the DVD-ROM and main content that is a digital work. A main player reads the bind key from the DVD-ROM, acquires sub-content that relates to the main content stored on the DVD-ROM, generates encrypted sub-content by encrypting the acquired sub-content based on the read bind key, and writes the generated encrypted content to an SD memory card. A sub-player reads the bind key from the DVD-ROM, reads the encrypted sub-content from the SD memory card, generates sub-content by decrypting the read encrypted sub-content based on the bind key, and plays back the generated sub-content.
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申请公布号 |
US7353543(B2) |
申请公布日期 |
2008.04.01 |
申请号 |
US20030339567 |
申请日期 |
2003.01.10 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OHMORI MOTOJI;MINAMI MASATAKA;YAMAMOTO MASAYA |
分类号 |
G06F7/04;G06F12/14;G06F15/16;G06F17/00;G06F21/00;G11B20/00;G11B20/10;G11B27/034;G11B27/10;H04L9/08;H04L9/32;H04N5/91;H04N5/913;H04N9/87 |
主分类号 |
G06F7/04 |
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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