发明名称 |
REPRODUCTION APPARATUS, REPRODUCTION METHOD AND INFORMATION RECORDING MEDIUM |
摘要 |
According to one embodiment, an information storage medium comprises a content encrypted by a content encryption key; a content encryption key file encrypted by a first encryption key or third encryption key; an encryption key block from which a third encryption key prime providing a source of the first encryption key or third encryption key by being processed by using a second encryption key of a player; and a program configured to make the player calculate the third encryption key from the third encryption key prime. The content encryption key file comprises a flag indicating whether the key file is encrypted by the third encryption key or first encryption key.
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申请公布号 |
US2009086966(A1) |
申请公布日期 |
2009.04.02 |
申请号 |
US20080237055 |
申请日期 |
2008.09.24 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
HARUKI KOSUKE;KAMBAYASHI TORU |
分类号 |
H04L9/06 |
主分类号 |
H04L9/06 |
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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