基于冗余属性的OOX文本数字水印算法

Digital watermarking algorithm based on redundant attributes for OOX documents

针对流行最广的Office Open XML格式文档(即MS Office 2007—2013),提出一种基于冗余属性的文本数字水印算法.利用OOX(Office Open XML)文档包中部件的冗余信息来嵌入水印,并使水印与文档的格式信息绑定,可有效抵抗针对文本内容的攻击.该方法具有较强的鲁棒性和较大的嵌入容量,能够抵抗"另存为"、"清除格式"等攻击,且没有改变原始文档显示字符的任何格式信息,这是以往针对格式文档提出的水印方法做不到的,同时,也没有改变原始文档的任何语义信息,这也是以往的基于语义(自然语言)的水印方法做不到的.实验结果说明了该算法的可行性.

For the most widely used Office Open XML（ OOX） format documents（ MS Office 2007—2013）,this paper proposes a robust watermarking algorithm based on the redundant attribute. Watermarking information,which is linked to the format information of document,can be imperceptibly embedded into the redundancy space of OOX parts. The method can resist text content-based active attacks. The method this paper proposed has better robustness and embedding capacity,which can resist＂Clean Format＂,＂Save As＂and other active attacks. The proposed watermarking method does not change any format or semantic information of the original documents,which no existing methods would do. The experiment demonstrates the feasibility of the algorithm.