Bandwidth efficient buyer-seller watermarking protocol

Authors:
Zhongqiu Xu;Liangju Li;Haibo Gao
Affiliations:
Department of Academic Affairs Office, Hunan International Economics University, Changsha 410205, Hunan, China;Department of Continuation Education, Hunan International Economics University, Changsha 410205, Hunan, China;College of Computer Science and Technology, Hunan International Economics University, Changsha 410205, Hunan, China
Venue:
International Journal of Information and Computer Security
Year:
2012

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Abstract

Digital watermarking has been used widely for the purposes of copyright protection and copy deterrence for multimedia content. In a forensic watermarking architecture, a buyer-seller watermarking protocol can enable a seller to identify a traitor from a pirated copy, while preventing the seller from framing an innocent buyer. Existing schemes are inefficient in practice for their high bandwidth usage. This paper proposes a buyer-seller watermarking protocol that 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.