JPEG域随机LSB替换隐写术的提取攻击  

Extraction Attack for Random LSB Replacement Steganography in the JPEG Domain

作　　者：石雅男 田雨果 刘九芬[1] SHI Yanan;TIAN Yuguo;LIU Jiufen(Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学

出　　处：《信息工程大学学报》2018年第6期696-700,共5页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(61772549)

摘　　要：隐写分析的研究主要集中于隐藏信息的存在性检测,然而能否提取隐藏的秘密信息(即提取攻击)对于有效取证隐蔽通信行为、打击网络犯罪起决定性作用。主要研究基于置乱变换的JPEG域LSB替换隐写术的提取攻击问题。首先探讨Arnold变换的周期性质,然后根据嵌入算法的分块特性,提出降低隐写密钥测试长度的提取攻击算法。理论分析和实验结果表明,该方法计算复杂度远低于Fridrich的卡方检验方法。Research on steganalysis is mainly focused on the existence detection of hidden messages.However,the extraction of hidden message,i.e.,extraction attacks,also plays a decisive role in tasks such as obtaining evidence of covert communication and fighting against criminal activities.This paper focuses on the extraction attacks for LSB replacement steganography in the JPEG domain based on scrambling transformation.First,the periodic properties of Arnold transformation are discussed.Then,an extraction attack algorithm is proposed to reduce the test length of steganographic key,based on the block characteristics of the embedded algorithm.Both theoretical analysis and experimental results show that the computational complexity of this method is much lower than that of chi-square test proposed by Fridrich.

关 键 词：隐写分析 提取攻击 LSB替换 JPEG域 ARNOLD变换 

分 类 号：TN918.1[电子电信—通信与信息系统]