Collusion-Secure Fingerprinting for Digital Data (Extended Abstract)
CRYPTO '95 Proceedings of the 15th Annual International Cryptology Conference on Advances in Cryptology
Watercasting: Distributed Watermarking of Multicast Media
NGC '99 Proceedings of the First International COST264 Workshop on Networked Group Communication
SP '83 Proceedings of the 1983 IEEE Symposium on Security and Privacy
Enabling Hierarchical and Bulk-Distribution for Watermarked Content
ACSAC '01 Proceedings of the 17th Annual Computer Security Applications Conference
Soft-Decision Tracing in Fingerprinted Multimedia Content
IEEE MultiMedia
Efficient communication-storage tradeoffs for multicast encryption
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
Collusion-secure fingerprinting for digital data
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Digital fingerprinting codes: problem statements, constructions, identification of traitors
IEEE Transactions on Information Theory
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One of the main problems that remain to be solved in pay-per-view Internet services is copyright protection. As in almost every scenario, any copyright protection scheme has to deal with two main aspects: protect the true content authors from those who may dishonestly claim ownership of intellectual property rights and prevent piracy by detecting the authorized (but dishonest) users responsible of illegal redistribution of copies. The former aspect can be solved with watermarking techniques while for the latter, fingerprinting mechanisms are the most appropriate ones. In internet services such as Web-TV or near video on-demand where multicast is used, watermarking can be directly applied. On the other hand, multicast fingerprinting has been seldom studied because delivering different marked content for different receivers seems a contradiction with multicast basics. In this paper we present a solution to prevent unauthorized redistribution of content in multicast scenarios. The system is based on a trusted soft-engine embedded in the receiver and co-managed by the content distributor. The trusted soft-engine is responsible of the client-side multicast key management functions. It only will allow the decryption and displaying of the actual data if it has previously inserted a fingerprinting mark with the identity of the decoder. Upon finding a pirate copy of any multicast delivered content, this mark can be used to unambiguously reveal the identity of the receiver that decoded the content from which the pirate copies are made.