An Efficient Public Key Traitor Tracing Scheme
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
CRYPTO '94 Proceedings of the 14th Annual International Cryptology Conference on Advances in Cryptology
Traitor Tracing with Constant Transmission Rate
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
PKC '99 Proceedings of the Second International Workshop on Practice and Theory in Public Key Cryptography
Optimal probabilistic fingerprint codes
Journal of the ACM (JACM)
Improved versions of Tardos' fingerprinting scheme
Designs, Codes and Cryptography
Efficient Traitor Tracing from Collusion Secure Codes
ICITS '08 Proceedings of the 3rd international conference on Information Theoretic Security
Traitor tracing with constant size ciphertext
Proceedings of the 15th ACM conference on Computer and communications security
Traitors Collaborating in Public: Pirates 2.0
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
Tracing and Revoking Pirate Rebroadcasts
ACNS '09 Proceedings of the 7th International Conference on Applied Cryptography and Network Security
Encryption for Digital Content
Encryption for Digital Content
Security notions for broadcast encryption
ACNS'11 Proceedings of the 9th international conference on Applied cryptography and network security
TCC'10 Proceedings of the 7th international conference on Theory of Cryptography
Collusion-secure fingerprinting for digital data
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Renewable traitor tracing: a trace-revoke-trace system for anonymous attack
ESORICS'07 Proceedings of the 12th European conference on Research in Computer Security
Traitor tracing with optimal transmission rate
ISC'07 Proceedings of the 10th international conference on Information Security
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Traitor tracing is an important tool to discourage defrauders from illegally broadcasting multimedia content. However, the main techniques consist in tracing the traitors from the pirate decoders they built from the secret keys of dishonest registered users: with either a black-box or a white-box tracing procedure on the pirate decoder, one hopes to trace back one of the traitors who registered in the system. But new techniques for pirates consist either in sending the ephemeral decryption keys to the decoders for real-time decryption, or in making the full content available on the web for later viewing. This way, the pirate does not send any personal information. In order to be able to trace the traitors, one should embed some information, or watermarks, in the multimedia content itself to make it specific to the registered users. This paper addresses this problem of tracing traitors from the decoded multimedia content or rebroadcasted keys, without increasing too much the bandwidth requirements. More precisely, we construct a message-traceable encryption scheme that has an optimal ciphertext rate, i.e. the ratio of global ciphertext length over message length is arbitrarily close to one.