An anonymous buyer‐reseller watermarking protocol
Tzung‐Her Chen, Gwoboa Horng, Du-Shiau Tsai · Journal of the Chinese Institute of Engineers · 2005
In (Memon and Wong, 2001), Memon and Wong first proposed a buyer‐seller watermarking protocol. Inspired by (Memon and Wong, 2001), Cheung and Curreem recently proposed a buyer‐reseller watermarking protocol to address the digital contents redistribution in the second‐hand markets over the Internet (Cheung and Curreem, 2002). In this paper, we show that their watermarking protocol is vulnerable to malicious attacks and propose a simple improvement. The main contribution is that we extend their schemes to enable anonymous transactions among a buyer, a reseller, and a seller in order to further protect the privacy of the buyers.