Natural Language Watermarking

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.