Method and apparatus for performing session based conditional access
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United States of America Patent
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-
Aug 4, 2009
Grant Date -
Aug 14, 2003
app pub date -
Feb 10, 2003
filing date -
Mar 31, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A video-on-demand conditional access information distribution system includes establishing a session with a set top terminal by defining an in-band communications channel for transporting content to the set top terminal, and communicating to the set top terminal via the defined in-band communications channel, an authorization message and descrambling message suitable for determining a descrambling key for descrambling a program stream. The set top terminal sends a request for content via an out of band communications channel and a scrambled program stream is provided to the set top terminal via the defined in-band communications channel. The authorization message is sent prior to the set top terminal receiving the descrambling message and the scrambled program stream, which includes video-on-demand content requested by the set top terminal.
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