基于随机算法的中文文本无载体隐写方法
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摘要
针对文本的隐写方法以修改文本载体为主,易被检测,可修改特征较少其隐写容量受限等,提出基于空间转换的思想,结合秘密消息文本序列和文本载体词频表,将文本序列映射成数字序列,借助随机算法将数字序列生成密钥实现文本无载体隐写。基于搜狗新闻文本数据集的研究结果表明,该方法不易被检测,安全性能高,通过起始标识符和终止标识符的设定隐写容量可无限扩充,通过构建文本数据库和载体选择的方式验证了该方法的可行性。
The existing text-based steganography methods mainly modify the text,are easy to detect,and its steganographic capacity is very limited because of fewer modifiable features.A new idea based on space conversion is proposed,which combines secret message text sequence and text carrier word frequency table,maps text sequence to digital sequence,and then uses random algorithm to generate key from digital sequence to realize coverless text steganography.The research results based on Sogou News Text Data Set show that this method is not easy to detect and has high security performance.The steganography capacity can be expanded infinitely by setting the initial identifier and the termination identifier.The feasibility of this method is verified by constructing text database and selecting the carrier.
The existing text-based steganography methods mainly modify the text,are easy to detect,and its steganographic capacity is very limited because of fewer modifiable features.A new idea based on space conversion is proposed,which combines secret message text sequence and text carrier word frequency table,maps text sequence to digital sequence,and then uses random algorithm to generate key from digital sequence to realize coverless text steganography.The research results based on Sogou News Text Data Set show that this method is not easy to detect and has high security performance.The steganography capacity can be expanded infinitely by setting the initial identifier and the termination identifier.The feasibility of this method is verified by constructing text database and selecting the carrier.
引文
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[14]Cachin C.An information-theoretic model for steganography[C]//The Second Workshop on Information Hiding.Oregon,USA,1998:306-318.
[2] Koluguri A,Gouse S,Reddy P B.Text Steganography Methods and its Tools[J].International Journal of Advanced Scientific and Technical Research.2014,2(4):888-902.
[3] Zhou Z,Sun H,Harit R,et al.Coverless Image Steganography Without Embedding[C]//International Confence on Cloud Computing and Security,2015:123-132.
[4] Chen X,Sun H,Tobe Y,et al.Coverless Information Hiding Method Based on the Chinese Mathematical Expression[C]//Cloud Computing and Security.Springer International Publishing,2015:133-143.
[5]吉红勇,付章杰,孙星明.基于单关键词的文本无载体信息隐藏方案[C]//第十三届全国信息隐藏暨多媒体信息安全学术大会论文集.合肥:2016:62-72.
[6] Akbas E A.A New Text Steganography Method By Using Non-Printing Unicode Characters[J].Eng&Tech.Journal,2010,28(1):72-83.
[7] Katzenbeissers,Petitcolas F.Information hiding Techniques for Steganography and Digital Watermarking[J].Artech House,Inc.2000,18(6):53-54.
[8]孙圣和,路哲明,牛夏牧,等.数字水印技术及应用[M].北京:科学出版社,2004.
[9]甘灿.基于同义词替换的自然语言文本信息隐藏技术研究[D].长沙:湖南大学,2008.
[10]甘灿,孙星明,刘玉玲,等.一种改进的基于同义词替换的汉语文本信息隐藏方法[J].东南大学学报(自然科学版),2007,37(s1):137-140.
[11]LiuT Y,Tsai W H.A New Steganographic Method for Data Hiding in Microsoft Word Documents by a Change Tracking Technique[J].IEEE Transactions on Information Forensics&Security,2007,2(1):24-30.
[12]Zhang J J,Huang H J,Wang L C,et al.Coverless Text Information Hiding MethodUsing the Frequent Words Hash[J].International Journal of Network Security.2017,19(6):1016-1023.
[13]王晓东著.计算机算法设计与分析[M].北京:电子工业出版社,2012.
[14]Cachin C.An information-theoretic model for steganography[C]//The Second Workshop on Information Hiding.Oregon,USA,1998:306-318.