Watermarking method of Chinese natural language text is proposed,which controls the presence of the auxiliary word "de" in modification phrases and adjusts the order of items in a joint construction modifier. Based on its pragmatic function,the presence of the auxiliary word "de" can be controlled to realize text modification. When the modifier is a joint construction, the order of its items is generally free. Thus text modification can be made through adjusting the order of its items. In addition, framing and error-correcting coding techniques are introduced to improve robustness. The experiment shows that this method has the advantage of concealment and gains favorable result in steganography capability. It can be applied in existing natural language processing system.%提出一种在汉语偏正短语中增删助词“的”,以及调整联合结构修饰语中各项次序的中文自然语言文本水印方法.该方法利用结构助词“的”的语用功能和联合结构中各项次序的自由性,通过控制助词“的”的出现方式或调整联合结构中内部各项的次序,对文本进行修改.为了增强鲁棒性,对秘密信息附加了分帧和纠错编码等处理.实验结果表明,该方法的隐蔽性好,隐藏容量较大,便于在现有的自然语言处理系统中实现.
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