Invention Application
WO2004045213A2 EFFICIENT DISTRIBUTION OF ENCRYPTED CONTENT FOR MULTIPLE CONTENT ACCESS SYSTEMS
审中-公开
多内容访问系统中加密内容的有效分发
- Patent Title: EFFICIENT DISTRIBUTION OF ENCRYPTED CONTENT FOR MULTIPLE CONTENT ACCESS SYSTEMS
- Patent Title (中): 多内容访问系统中加密内容的有效分发
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Application No.: PCT/US2003/036356Application Date: 2003-11-13
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Publication No.: WO2004045213A2Publication Date: 2004-05-27
- Inventor: SPRUNK, Eric, J.
- Applicant: GENERAL INSTRUMENT CORPORATION
- Applicant Address: 101 Tournament Drive, Horsham, PA 19044 US
- Assignee: GENERAL INSTRUMENT CORPORATION
- Current Assignee: GENERAL INSTRUMENT CORPORATION
- Current Assignee Address: 101 Tournament Drive, Horsham, PA 19044 US
- Agency: SILVERIO, John
- Priority: US60/425,802 20021113
- Main IPC: H04N7/167
- IPC: H04N7/167
Abstract:
A system and method for digital data distribution is disclosed. The system and method provides a set of one or more source streams encoded by an encoder to form a common data stream for distribution to a plurality of destination systems, each authorized to access at least a portion of the common data stream. Encryption comprises obtaining the source stream, identifying some blocks of the source stream as secure blocks, identifying some other blocks of the source stream as unsecured blocks, encrypting the secure blocks for each of a plurality of destination system classes wherein each of the plurality of destination systems is a member of one or more destination system classes, and each of the blocks of an encrypted secure block set is decryptable by destination systems in the class associated with that encrypted secure block set.
Information query
