发明名称 |
STORAGE MEDIUM RENTAL SYSTEM |
摘要 |
A storage-medium rental system includes a portable storage medium to be rented to the user, a portable semiconductor memory owned by the user, a rental-shop apparatus owned by the rental agent, and a playback apparatus owned by the user. The storage medium prestores encrypted content generated by encrypting digital work using a content encryption key. The semiconductor memory has an area f or securely storing a content decryption key. The rental-shop apparatus stores a content decryption key for decrypting the encrypted content. The rental-shop apparatus writes the content decryption key to the semiconductor memory. The playback apparatus securely reads the content decryption key from the semiconductor memory, reads the encrypted content from the storage medium, decrypts the encrypted content using the content decryption key, and plays back the decrypted content. |
申请公布号 |
WO2004023524(A3) |
申请公布日期 |
2004.07.08 |
申请号 |
WO2003US27719 |
申请日期 |
2003.09.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;OHMORI, MOTOJI;MINAMI, MASATAKA;YAMAMOTO, MASAYA |
发明人 |
OHMORI, MOTOJI;MINAMI, MASATAKA;YAMAMOTO, MASAYA |
分类号 |
G06F21/24;G06F12/14;G06Q30/06;G10L19/00;G11B20/00;G11B20/10;H01L |
主分类号 |
G06F21/24 |
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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