| 对随机LSB隐写术的选择密钥提取攻击 |
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| 引用本文： | 陈嘉勇,祝跃飞,张卫明,刘九芬.对随机LSB隐写术的选择密钥提取攻击[J].通信学报,2010,31(5):73-80. |
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| 作者姓名： | 陈嘉勇 祝跃飞 张卫明 刘九芬 |
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| 作者单位： | 1. 解放军信息工程大学,网络工程系,河南,郑州,450002
2. 解放军信息工程大学,应用数学系,河南,郑州,450002 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划("863"计划)基金资助项目 |
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| 摘 要： | 提出一种针对随机LSB隐写术的选择密钥提取攻击方法.对一类伪随机置换隐写术建立有向圈模型,证明了有向圈模型中存在大量等价密钥和相邻密钥,并给出计算等价密钥量的方法.利用等价密钥和相邻密钥的性质,结合突变点检测法,提出一种基于选择密钥的提取攻击算法,其计算复杂度低于Fridrich方法.理论分析和实验结果均表明,即使对消息嵌入率估计存在较大误差,该算法仍具有较强稳健性.
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| 关 键 词： | 信息隐藏 隐写分析 伪随机置换 隐写密钥 提取攻击 |
Chosen-key extracting attack to random LSB steganography |
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| CHEN Jia-yong,ZHU Yue-fei,ZHANG Wei-ming,LIU Jiu-fen.Chosen-key extracting attack to random LSB steganography[J].Journal on Communications,2010,31(5):73-80. |
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| Authors: | CHEN Jia-yong ZHU Yue-fei ZHANG Wei-ming LIU Jiu-fen |
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| Institution: | CHEN Jia-yong1,ZHU Yue-fei1,ZHANG Wei-ming2,LIU Jiu-fen2 (1.Network Engineering Department,PLA Information Engineering University,Zhengzhou 450002,China,2.Applied Mathematics Department,China) |
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| Abstract: | A chosen-key extracting attack based on random LSB steganography was proposed.By constructing an orient ring model for a sort of pseudo-random steganography algorithms,it proved that there are many equivalent keys and neighboring keys in the model,and then proposed a method to calculate the number of equivalent keys.With the charac-ter of equivalent keys,neighboring keys and outlier detection method,the proposed scheme achieved lower computational complexity than the method proposed by Fridrich.Both academi... |
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| Keywords: | JSteg |
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