Transmission method for conditional access content
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United States of America Patent
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Jan 8, 2013
Grant Date -
Jun 21, 2007
app pub date -
Dec 14, 2006
filing date -
Dec 15, 2005
priority date (Note) -
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Abstract
This invention relates to a transmission method for conditional access content, in which said content is broadcast in the form of data packets (DP). These data packets contain at least one marker having a known value and a useful part (PL). This method includes the following steps:
- extraction of said marker (Mc) from the data packet (DP) and replacement of this marker with an encryption key identification information (PAR);encryption of said useful part (PL) by an encryption key (K1) that can be identified by said encryption key identification information (PAR);formation of an encrypted data packet containing at least said encryption key identification information (PAR) and the encrypted useful part (PLK1);transmission of said encrypted data packet to at least one receiver.
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