应用科学学报 ›› 2015, Vol. 33 ›› Issue (6): 575-584.doi: 10.3969/j.issn.0255-8297.2015.06.001

• 多媒体信息安全专刊 • 上一篇    下一篇

基于安全水印的三方交易系统

辛昕, 钱振兴, 张新鹏, 代舒   

  1. 上海大学通信与信息工程学院, 上海 200444
  • 收稿日期:2015-07-23 修回日期:2015-11-09 出版日期:2015-11-30 发布日期:2015-11-30
  • 通信作者: 钱振兴,副研究员,研究方向:信息隐藏、加密信号处理,E-mail:zxqian@shu.edu.cn E-mail:zxqian@shu.edu.cn
  • 基金资助:

    国家自然科学基金(No.61572308);上海市青年科技启明星人才计划基金(No.14QA1401900)资助

Tripartite Trade System Based on Secure Watermarking

XIN Xin, QIAN Zhen-xing, ZHANG Xin-peng, DAI Shu   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
  • Received:2015-07-23 Revised:2015-11-09 Online:2015-11-30 Published:2015-11-30

摘要: 针对电子商务中三方交易存在的问题,提出基于安全水印的三方交易系统.在买卖方水印协议中加入第3方,卖方将所拥有的图像委托给服务器,让服务器与买方进行交易.首先依靠同态加密和扩频,在卖方的原始图像中嵌入服务器的水印,并将含水印的图像发送给服务器.服务器接收到图像后,先通过扩频抖动调制嵌入用于追踪非法传播时锁定可疑买方的定位水印,然后与买方执行基于同态加密的买卖方水印协议.在电子商务平台三方交易中,基于安全水印的三方交易系统不仅可保证服务器和买方不被陷害,而且可追踪非法传播的买方或服务器,为大用户群提供安全交易方案.

关键词: 买卖方水印协议, 同态加密, 三方交易, 安全水印

Abstract: To ensure security of e-commerce, we propose a tripartite trade system based on secure watermarking. We add a third party (server) in the buyer-seller watermarking protocol. The seller sends his/her own image to the server, and let the server trade with the buyer. The seller first uses homomorphic encryption and spreading to embed the server's watermark in the original image and send the marked image to the server. Having received the marked image, the server uses spread-spectrum dither modulation to embed another watermark to be used for locating suspicious buyers who illegally distribute the image. The server then executes the buyer-seller watermarking protocol based on homomorphic encryption. In the tripartite trade of the e-commerce platform, the proposed system not only prevents both the server and buyer from being framed, but also can trace illegal distribution of any buyer or the server. The system also provides a solution to the secure online transactions for a large number of users.

Key words: buyer-seller watermarking protocol, homomorphic encryption, tripartite trade, secure watermark

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