Security method for preventing the unauthorized use of multimedia contents
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United States of America Patent
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Oct 29, 2013
Grant Date -
Dec 1, 2011
app pub date -
May 19, 2011
filing date -
May 26, 2010
priority date (Note) -
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Abstract
A method embeds tracing secret data into multimedia contents delivered to particular users. The method descrambles a first scrambled video stream having alternate values to obtain a personalized video stream corresponding to an original video stream by a decoder comprising at least a security unit and a descrambling unit, the personalized video stream being obtained by restoring the alternate values by personalized values taking into account an internal parameter on the security unit and received control data containing the original values and their location in the modified stream.
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