An Efficient and Practical Scheme for Privacy Protection in the E-Commerce of Digital Goods
ICISC '00 Proceedings of the Third International Conference on Information Security and Cryptology
Oblivious Transfer with Adaptive Queries
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Optimal probabilistic fingerprint codes
Proceedings of the thirty-fifth annual ACM symposium on Theory of computing
Universally Composable Security: A New Paradigm for Cryptographic Protocols
FOCS '01 Proceedings of the 42nd IEEE symposium on Foundations of Computer Science
Foundations of Cryptography: Volume 2, Basic Applications
Foundations of Cryptography: Volume 2, Basic Applications
Encyclopedia of Cryptography and Security
Encyclopedia of Cryptography and Security
Symmetric Tardos fingerprinting codes for arbitrary alphabet sizes
Designs, Codes and Cryptography
A survey of homomorphic encryption for nonspecialists
EURASIP Journal on Information Security
Simulatable Adaptive Oblivious Transfer
EUROCRYPT '07 Proceedings of the 26th annual international conference on Advances in Cryptology
An efficient buyer-seller watermarking protocol based on composite signal representation
Proceedings of the 11th ACM workshop on Multimedia and security
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
Blind identity-based encryption and simulatable oblivious transfer
ASIACRYPT'07 Proceedings of the Advances in Crypotology 13th international conference on Theory and application of cryptology and information security
Authentic time-stamps for archival storage
ESORICS'09 Proceedings of the 14th European conference on Research in computer security
On the implementation of spread spectrum fingerprinting in asymmetric cryptographic protocol
EURASIP Journal on Information Security
Efficient k-out-of-n oblivious transfer schemes with adaptive and non-adaptive queries
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Collusion-secure fingerprinting for digital data
IEEE Transactions on Information Theory
An asymmetric fingerprinting code for collusion-resistant buyer-seller watermarking
Proceedings of the first ACM workshop on Information hiding and multimedia security
Optimal suspicion functions for tardos traitor tracing schemes
Proceedings of the first ACM workshop on Information hiding and multimedia security
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Asymmetric fingerprinting protocols are designed to prevent an untrustworthy Provider incriminating an innocent Buyer. These protocols enable the Buyer to generate their own fingerprint by themself, and ensure that the Provider never has access to the Buyer's copy of the Work. Until recently, such protocols were not practical because the collusion-resistant codes they rely on were too long. However, the advent of Tardos codes means that the probabilistic collusion-resistant codes are now sufficiently short that asymmetric fingerprint codes should, in theory, be practical. Unfortunately, previous asymmetric fingerprinting protocols cannot be directly applied to Tardos codes, because generation of the Tardos codes depends on a secret vector that is only known to the Provider. This knowledge allows an untrustworthy Provider to attack traditional asymmetric fingerprinting protocols. We describe this attack, and then propose a new asymmetric fingerprinting protocol, specifically designed for Tardos codes.