Lei Chin-Laung, Yu Pei-Ling, Tsai Pan-Lung, Chan Ming-Hwa
Department of Electrical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC.
IEEE Trans Image Process. 2004 Dec;13(12):1618-26. doi: 10.1109/tip.2004.837553.
For the purpose of deterring unauthorized duplication and distribution of multimedia contents, a seller may insert a unique digital watermark into each copy of the multimedia contents to be sold. When an illegal replica is found in the market sometime later, the seller can determine the responsible distributor by examining the watermark embedded. However, the accusation against the charged distributor, who was the buyer in some earlier transaction, is objectionable because the seller also has access to the watermarked copies and, hence, is able to release such a replica on her own. In this paper, a watermarking protocol is proposed to avoid such difficulties, known as the customer's right problem, in the phase of arbitration. The proposed watermarking protocol also provides a fix to Memon and Wong's scheme by solving the unbinding problem. In addition, the buyer is no longer required to contact the watermark certification authority during transactions, and the anonymity of the buyer can be retained through a trusted third party. The result is an efficient and anonymous buyer-seller watermarking protocol.
为了阻止多媒体内容的未经授权复制和分发，卖家可以在待售的每份多媒体内容副本中插入唯一的数字水印。当一段时间后在市场上发现非法复制品时，卖家可以通过检查嵌入的水印来确定责任经销商。然而，对被指控的经销商（其在早期交易中是买家）的指控是有问题的，因为卖家也可以访问带水印的副本，因此能够自行发布这样的复制品。本文提出了一种水印协议，以避免在仲裁阶段出现此类困难，即客户权利问题。所提出的水印协议还通过解决解绑问题对梅蒙和王的方案进行了修正。此外，买家在交易期间不再需要联系水印认证机构，并且可以通过可信第三方保留买家的匿名性。结果是一个高效且匿名的买卖双方水印协议。
