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
WO2006020320(A2)
申请公布日期
2006.02.23
申请号
WO2005US25728
申请日期
2005.07.19
申请人
COMCAST CABLE HOLDINGS, LLC;FAHRNY, JAMES, WILLIAM;COMPTON, CHARLES, L.