发明名称 |
SYSTEM AND METHOD FOR REDUCED HIERARCHY KEY MANAGEMENT |
摘要 |
A controller for managing media stream decryption keys includes a media decryption engine, a table, and a content key list. The media decryption engine receives an encrypted media stream from a headend and presents a decrypted media stream to a receiving device in response to a decryption key, wherein the decryption key is a function of a content key. The table contains a content key index and a plurality of corresponding content keys. Content keys that correspond to a particular encrypted media stream are selected from the content key list using an index from the content key table, and that is referenced by an identifier received from a headend in connection with the encrypted media stream. |
申请公布号 |
CA2576460(C) |
申请公布日期 |
2014.09.09 |
申请号 |
CA20052576460 |
申请日期 |
2005.07.19 |
申请人 |
COMCAST CABLE HOLDINGS, LLC |
发明人 |
FAHRNY, JAMES WILLIAM;COMPTON, CHARLES L. |
分类号 |
H04N21/4405;H04L9/14;H04L9/16;H04N7/24 |
主分类号 |
H04N21/4405 |
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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