CAJ | 학술논문

基于虚词变换的文本信息隐藏方法通过增删汉语中的高频虚词进行信息隐藏,该方法不影响载体文本的语义,具有较好的隐蔽性和抗检测能力.通过总结虚词使用的语言特征,分析增删虚词带来的违背语法和习惯用法等问题,同时根据多数情况下隐藏信息后标记短语增加,非标记短语减少这一重要统计特征,提出一种最近邻法与语言特征分析相结合的检测方法.实验结果表明,该方法具有较低的虚警率和漏警率,对基于虚词变换的文本信息隐藏方法能进行有效检测.
기우허사변환적문본신식은장방법통과증산한어중적고빈허사진행신식은장,해방법불영향재체문본적어의,구유교호적은폐성화항검측능력.통과총결허사사용적어언특정,분석증산허사대래적위배어법화습관용법등문제,동시근거다수정황하은장신식후표기단어증가,비표기단어감소저일중요통계특정,제출일충최근린법여어언특정분석상결합적검측방법.실험결과표명,해방법구유교저적허경솔화루경솔,대기우허사변환적문본신식은장방법능진행유효검측.
Function-word-modification-based steganography in text is a technique that modifies high-frequency function words to hide information.Since it does not change the meaning of the original text,this technique possesses nice imperceptibility characteristics and anti-detection characteristics.The authors of this paper propose a steganalysis method by investigating the characteristics of function words and analyzing the changes in the number of different function words categories after being embedded.This method utilizes an algorithm based on the nearest neighbor for statistical detection and combines it with syntax analysis.The experimental results show that the false positive rate and the false negative rate of the steganalysis method both are low,and hence,this method can effectively detect stego-texts.