【摘要】 本文主要介绍了基于自然语言处理的文本水印技术 ,也即自然语言文本水印技术。该技术是在不改变文本原意的前提下 ,将需要隐藏的文本信息 (水印信息 )插入到原始文本中的一种信息隐藏技术。这种技术对于确认信息来源和信息的秘密传送 ,以及版权维护等方面都有着很大的应用价值。本文首先给出了基于自然语言处理技术的文本水印的概念、特点及攻击模型 ,并对文本水印的研究现状进行了分析。通过分析可以看出 ,自然语言文本水印技术有着更好的灵活性 ,并且在适度的攻击下 ,不会破坏水印信息。本文详细介绍了文本水印系统的设计过程 ,包括该技术的基础数学理论 -二次余数理论。最后详细介绍了两种自然语言文本水印嵌入方法 ,分别是基于句法分析和基于语义的水印嵌入方法。更多还原

【Abstract】 A new technique based on natural language processing was proposed in this paper,that is,natural language watermarking.It is a novel technique for in formation hiding.The meaning of the original text can not be changed after embedding the hiding information(watermark message)in it using this technique.Firstly,the concept,characteristic and the adversary model of natural language watermarking were presented in this paper.This paper also investigated some related research works in this field.This method was more flexible than traditional methods,and the watermark can not be damaged under moderate attacks.Secondly, the design of watermarking system,including the theory of quadratic-residue which is the basis theory of this method were described in detail in this paper.Finally,two marking schemes were described in detail,the syntactic watermarking approach and the semantic watermarking approach.更多还原