Asymmetric fingerprinting based on 1-out-of-n oblivious transfer

Authors:
Defa Hu;Qiaoliang Li
Affiliations:
Department of Computer and Communication, Hunan University, Changsha, China;Department of Computer and Mathematics, Hunan Normal University, Changsha, China
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

In asymmetric fingerprinting, the merchant can trace the traitors from a pirated copy by means of the embedded unique fingerprint, while the customer is immune of being framed due to the asymmetric property. In this letter, we propose an asymmetric fingerprinting scheme based on 1-out-of-n oblivious transfer (OTn1), which is efficient from the bandwidth usage point of view. First, multicast that is an efficient transport technology for one-to-many communication is exploited, which can reduce the bandwidth usage significantly. Second, symmetric encryption instead of public-key encryption is performed on the multimedia content, which also can reduce the complexity and communication cost.