基于同义词扩展和标签传递机制的文本无载体信息隐藏方法  

Text coverless information hiding method based on synonyms expansion and label delivery mechanism

作　　者：张祯[1] 倪嘉铭 姚晔[1] 龚礼春 王玉娟[1] 吴国华[1] ZHANG Zhen;NI Jiaming;YAO Ye;GONG Lichun;WANG Yujuan;WU Guohua(School of Cyberspace,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学网络空间安全学院,浙江杭州310018

出　　处：《通信学报》2021年第9期173-183,共11页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62071267)。

摘　　要：为了解决传统文本信息隐藏方法隐藏容量低、抗检测性弱等问题,提出一种基于同义词扩展和标签传递机制的文本无载体信息隐藏方法。该方法将秘密信息切分成若干个关键词,分别嵌入不同的文本载体中。考虑到汉语中同义词的可替换性,使用基于知网的词语相似度计算方法筛选符合上下文语义的同义词,尽可能将不同的关键词或其同义词嵌入同一文本中,以此来提升隐藏容量。同时,记录每篇文本中所有被隐藏关键词的标签信息,将其按固定格式转换为二进制序列,作为秘密信息生成载体文本。最后,将自然载体文本和生成载体文本一起发送给接收方完成秘密通信。实验结果表明,所提方法的隐藏容量与传统方法相比有了较大的提升,具有较强的抗检测能力,使用小型载体文本数据库即可实现完整的信息隐藏和提取,减少了建立和维护索引数据库的开销。To solve the problems of low hiding capacity and weak detection resistance,a method of coverless information hiding based on synonyms expansion and label delivery mechanism was proposed.To begin the proposed method,the secret information were divided into several keywords,then those keywords were embedded in different carrier texts respectively.Considering the interchangeability of synonyms in Chinese,using the word similarity calculation method based on HowNet,it was possible to filter synonyms which met the contextual semantics.For the purpose of increasing hiding capacity,various keywords or their synonyms were embedded in the same carrier text as much as possible.At the same moment,when recording the positional parameters of the secret information in each carrier text,those parameters were converted into a binary sequence in a fixed format,which was used to generate carrier text.Finally,the carrier texts and generated text were sent to the receiver.Comparison of the results with those of other studies confirm that the proposed method not only makes great improvement in hiding capacity and detection resistance,but also reduces the overhead of establishing and maintaining databases by using small text database.

关 键 词：隐蔽通信 无载体信息隐藏 关键词扩展 标签传递机制 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]