发明名称 |
CONTENT ENCRYPTION USING AT LEAST ONE CONTENT PRE-KEY |
摘要 |
In a method for encrypting content, the content is received in a device and at least a portion of the content is stored to thereby associate the content with one of a first copy control state and a second copy control state. The method includes creating at least one of a first content pre-key using a local storage key unique to the device as a key to encrypt the content ID of the content and a second content pre-key using the first content pre-key as a key to encrypt the first copy control state, creating a content encryption key using one of the first content pre-key as a key to encrypt the first copy control state and the second content pre-key as a key to encrypt the second copy control state, and encrypting the content using the content encryption key.
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申请公布号 |
US2009296940(A1) |
申请公布日期 |
2009.12.03 |
申请号 |
US20090474259 |
申请日期 |
2009.05.28 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
MORONEY PAUL;PETERKA PETR |
分类号 |
H04L9/08;G06F21/24;H04L9/00 |
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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