基于语义角色标注的文本水印算法

为保护数字文本的知识产权，提出一种利用语义角色嵌入水印信息的文本水印算法。采用Unicode编码和Huffman编码对水印进行预处理形成特定形式的水印信息串，借助自然语言处理技术标注文本中的语义角色，将水印信息映射为语义角色的位置，实现水印的嵌入与提取。算法对文本的格式和内容不做任何修改，具有很强的隐蔽性和鲁棒性，能有效抵抗常见的格式变换和攻击，同时能提供较大的水印容量，与其它文本水印算法相比具有一定的优越性。

Text watermarking algorithm based on semantic role labeling

In order to protect the intellectual property of digital texts, this paper proposed a text watermarking algorithm that uses the semantic roles to embed watermark information. The algorithm used the Unicode and Huffman code to preprocess a watermark to form a particular form of watermark information. It used natural language processing technology to label the semantic roles in a text and embedded a watermark into the text by mapping the watermark information into the positions of the semantic roles. The algorithm does not make any change to the format and content of a text and has strong concealment and robustness. It can resist common format transformations and attacks, and provide a large watermark capacity at the same time. In comparison with other text watermarking algorithms, the proposed algorithm has advantages.