Key delivery in a secure broadcasting system
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United States of America Patent
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Jul 1, 2003
Grant Date -
N/A
app pub date -
Feb 4, 1999
filing date -
Mar 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A key delivery method for use in an encoded communications system in which at least one encoded item including a first item encoded with a first item control word is sent in a communication stream from a sender to a receiver, the method including transmitting an item entitlement control message (IECM) including item control information, transmitting a stream entitlement control message (SECM) including stream control information, and combining at least part of the item control information and at least part of the stream control information to produce the first item control word. Related methods and apparatus are also disclosed.
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