Traitor detection for multilevel assignment
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United States of America Patent
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Feb 21, 2012
Grant Date -
Dec 24, 2009
app pub date -
Jun 20, 2008
filing date -
Jun 20, 2008
priority date (Note) -
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Abstract
One embodiment of the present invention includes a method for traitor tracing that includes performing an inner code traitor tracing on a recovered pirated digital file, the recovered digital file incorporating an inner code for assigning segments of the digital file and an outer code for assigning inner codes to individual digital files. The method also includes extracting partial information regarding the outer code from the inner code tracing. An outer code tracing procedure may then be performed using the partial information.
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