07233948 is referenced by 264 patents and cites 374 patents.

Systems and methods for protection of streamed media content are disclosed. In one aspect, the system includes control means for governing content streams or objects, decryption means for decrypting content streams or objects, and feedback means for tracking use of content streams or objects. The control means may operate in accordance with rules received in the streamed content or through a side-band channel. The rules may specify allowed uses of the content, including whether the content can be copied or transferred, and whether content may be “checked out” of one device and used in another. The rules may also include budgets, and a requirement that audit information be collected and/or transmitted to server. In another aspect, a media player is disclosed that uses plugins to assist in rendering content. A “trust plugin” is used to enable a media player designed to render unprotected content to render protected content.

Title
Methods and apparatus for persistent control and protection of content
Application Number
9/276233
Publication Number
7233948 (B1)
Application Date
March 25, 1999
Publication Date
June 19, 2007
Inventor
David M Van Wie
Eugene
OR, US
W Olin Sibert
Lexington
MA, US
John P Hwa
Fremont
CA, US
Chris D Radcliffe
Redwood City
CA, US
Ralph D Hill
Los Gatos
CA, US
Talal G Shamoon
Palo Alto
CA, US
Agent
Finnegan Henderson Farabow Garrett & Dunner L
Assignee
Intertrust Technologies
CA, US
IPC
H04L 9/00
G06F 17/30
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