【摘要】 明确了数字水印的内涵,分析了水印算法可靠性的实现手段,深入研究了水印算法应该具备的特性以及水印算法如何在这些特性之间做出平衡。在文本数字水印概率算法的基础上创建了测试环境,测试环境包括对各种电子文件嵌入不同长度和冗余度的水印,并开发随机水印攻击程序来模拟水印被攻击的情况,建立了对不同程度破坏下提取水印错误率和时间的统计,观察了不同因素对算法可靠性的影响。更多还原

【Abstract】 The essence of watermarkin is discovered,The method for high reliability watermark algorithm is analyzed,The necessary characteristics of watermark algorithm are deeply developed and how to make balance among those characteristics.Then a test environment based on probabilistic algorithm of textual digital watermarking is built,the test environment includes functions such as embed variable information in variable text file with variable redundancy,extract the watermark information,random watermark attack function,and statistics on extracting error rate and time spending.How much the variable ingredient affect on reliability is observed.更多还原