Unified broadcast encryption system
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United States of America Patent
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Jan 9, 2018
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N/A
app pub date -
Jul 14, 2017
filing date -
Feb 27, 2008
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Abstract
A system and method is disclosed for performing unified broadcast encryption and traitor tracing for digital content. In one embodiment a media key tree is divided into S subtrees, the media key tree including media keys and initial values, which may be random values. The digital content is divided into a plurality of segments and at least some of the segments are converted into a plurality of variations. The random values are transformed into media key variations and a separate media key variant is assigned to each of the subdivided subtrees. A unified media key block including the media key tree is stored on the media.
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