METHOD AND SYSTEM FOR PROVIDING CONDITIONAL ACCESS IN BROADCASTING NETWORK
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United States of America Patent
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N/A
Issued Date -
Mar 1, 2012
app pub date -
Oct 26, 2010
filing date -
Aug 31, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system for providing conditional access (CA) between a headend and a receiver include scrambling media data of broadcast programs and encrypting control words according to a CA system used on the headend. The receiver includes a CA virtual machine. The receiver receives the broadcast program and encrypted control words, and determines whether the media data is scrambled. If the media data is scrambled, the CA virtual machine runs a CA instance matched with the CA system, gets entitled manage message (EMM), and determines whether CA algorithm identifier in the EMM matches with CA algorithm identifier of the CA instance. If the CA algorithm identifiers match, the encrypted control words are decrypted and the scrambled media data is descrambled. If the CA algorithm identifiers do not match, updated CA algorithm is downloaded and the CA instance which has updated its CA algorithm is run.
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