【摘要】 设计了一种用于盗版追踪的基于数字水印的买卖交易协议。协议中,为了减少可信任第三方的在线参与,引入了一个无记忆的水印认证授权中心WCA,它能为买方一次产生多个数字水印,从而不需要参与买卖双方的每次数字产品交易。为了解决买方匿名问题,WCA应加密买方的数字证书,并通过买方将其传递给卖方,使买方在购买数字作品时方能保持匿名。此外,本协议能解决其它各种已知的安全问题,如消费者权益、水印绑定问题、共谋问题、争论问题。分析结果表明,提出的协议是安全有效的。更多还原

【Abstract】 A novel buyer-seller watermarking protocol was designed for piracy tracing.In the proposed protocol,a me-moryless Watermark Certification Authority (WCA) was introduced,that can produce many watermarks for a buyer at a time and is not required to participate in each transaction of digital content between the buyer and seller.In order to guarantee the anonymity of the buyer,the WCA also can encrypt the digital certificate of buyer and hand over the encrypted message to seller via the buyer.In addition,the proposed protocol also can resolve other problems,such as the customer right problem,the binding attack problem,the digital conspiracy problem,the dispute problem.The analysis indicate that the proposed protocol is secure and practical.更多还原