Comments on a Buyer-Seller Watermarking Protocol for Large Scale Networks
Shuhua Wu, Qiong Pu · 2012
Buyer-seller watermarking are protocols guaranteeing the buyer prevents false infringement accusations and the seller protects the watermark secrets from the buyer. Most recently, Chang et al. proposed an efficient and fair buyer-seller watermarking scheme for large scale networks quite recently. In this correspondence, we first shows its three weaknesses: the buyer can easily remove the wa-termark, the buyer can easily destroy the forensic infor-mation and the adversary can possibly learn about per-sonal privacy of some honest customers. Thereafter, we suggest some countermeasures to defeat our described at-tacks while its merits are left unchanged.