Traitor tracing for prerecorded and recordable media
Proceedings of the 4th ACM workshop on Digital rights management
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Copyrighted materials are divided into multiple segments and each segment has multiple variations that are differently watermarked and encrypted. The combination of watermark and encryption enables one to identify the actual users (traitors) who have engaged in the piracy. In this paper, we shall present a traitor tracing scheme that can efficiently and flexibly defend against anonymous attacks.