文本数字水印的概率算法及其可靠性

深入研究和分析了水印算法可靠性的实现手段,明确定义了文本水印算法的分层结构,为文本水印算法的研究提供了清晰的层次和思路.提出了具有隐蔽性、安全性和可靠性的基于蒙特卡罗(Monte Carlo)概率算法的文本数字水印算法,该算法不但使用了概率算法的伪随机序列,而且在映射层使用语句的位置来定位,提高了可靠性.再根据蒙特卡罗概率算法的思想,加强算法冗余强度,使可靠性进一步提高.最后通过理论分析和测试数据分析,证明了算法的高可靠性.它能够为水印的多种应用提供基础算法,是当前文本数字水印研究的进步.

Probabilistic Algorithm of Textual Digital Watermarking and Reliability

The paper would firstly deeply develop and analyze the method for high reliability watermark algorithm,and defined hierarchical structure for textual digital watermarking distinctly,which provided clear hiberarchy and ways for study on Algorithm of Textual Digital Watermarking.Then the paper provided a hiding,security,and reliability watermarking algorithm which based on Monte Carlo probabilistic algorithm.This algorithm not only used bogus stochastic sequence of Probabilistic Algorithm,but also confirmed location by sentences at mapping layer,which improved the Reliability.Then the redundancy intensity of algorithm was enhanced according to Monte Carlo Probabilistic Algorithm,which improved the reliability again.Finally the paper proved the high reliability of probabilistic algorithm by theory and test data analysis.As a base of digital watermark research,it could also provide reliability watermark algorithm for watermark multi-appliance,and make a progress on research of textual digital watermarking.