A privacy-preserving buyer-seller watermarking protocol with semi-trust third party

Abstract

Digital watermarking is a value-added technique used in digital rights management systems for the purposes of copy protection and copy deterrence for digital contents, and it has inspired a large variety of work. Unfortunately, much of that work focus mainly on right-holder's security needs rather than those of consumers. This paper proposes a new buyer-seller watermarking protocol for the betterment of consumers' security needs. The key features of our scheme are including of loss-preventing security property ensured, semitrust third party involved, efficient protection from conspiracy attacks, and lightweight involvement for buyers. © Springer-Verlag Berlin Heidelberg 2007.