An Anti-attack Watermarking Based on Synonym Substitution for Chinese Tezt

摘要：

Current research of natural language steganographic algorithms based on synonymy substitution mostly focused on invisibility, but ignored robustness. However, automatic disambiguation of Chinese word senses(WSD) achieves high accuracy, the adversary could destroyed the watermark easily if he disambiguated the stego-text and did the synonym substitution again. In this paper, against the high accuracy of WSD algorithm, two indicators are proposed, which are Lexical Similarity and Sense Similarity. For reducing the accuracy rate of WSD, we argued that it should choose the word, which is low Lexical Similarity and high Senses Similarity, in the synonym substitution. Therefore, the automatically attack will failure. The experiment showed that the algorithm reduced the accuracy of WSD from 90.4％ to 74.5％. The robustness of watermarking has been improved.

关键词： Information hiding Natural Language Watermarking Synonym Substitution Anti-attack

作者: He Lu Lin JianBin Li TianZhi Fang DingYi

作者单位: School of Information Science & Technology Northwest University,XiAn,China;School of Electrical and School of Information Science & Technology Northwest University,XiAn,China School of Electrical and Information Engineering XiAn JiaoTong University XiAn,China

会议类型: 国际会议

会议名称: The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)

会议地点: 西安

会议语种:英文

页码: 356-359

在线出版日期: 2009-08-18（万方平台首次上网日期，不代表论文的发表时间）