Improving a Digital Rights Management Scheme for Video Broadcast
PCM '09 Proceedings of the 10th Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Joint watermarking scheme for multiparty multilevel DRM architecture
IEEE Transactions on Information Forensics and Security - Special issue on electronic voting
Secure client-side ST-DM watermark embedding
IEEE Transactions on Information Forensics and Security
Client side embedding for ST-DM watermarks
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Bandwidth efficient asymmetric fingerprinting based on one-out-of-two oblivious transfer
International Journal of Information and Computer Security
A chameleon encryption scheme resistant to known-plaintext attack
Proceedings of the tenth annual ACM workshop on Digital rights management
IH'12 Proceedings of the 14th international conference on Information Hiding
Broadcast monitoring protocol based on secure watermark embedding
Computers and Electrical Engineering
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Today, mass-scale electronic content distribution systems embed forensic tracking watermarks primarily at the distribution server. For limiting the bandwidth usage and server complexity and enhancing scalability, it is preferable to embed the watermark at the client. Embedding in these untrusted clients requires secure embedding methods that do not leak unmarked content or the watermarking secrets. In this work, we propose a secure watermark embedding scheme based on lookup tables for spread-spectrum watermarks, which are robust to noise and can be detected without comparison to the original content. We also develop fast detection mechanisms that make the watermark detection feasible for tracking systems with a large number of clients. Our fast detection algorithm improves detection speed of existing methods by six orders of magnitude in a typical system with millions of clients.