| 基于Arnold变换的图像置乱密码的安全性分析 |
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| 引用本文： | 刘婷,闵乐泉.基于Arnold变换的图像置乱密码的安全性分析[J].武汉大学学报(理学版),2011,57(5):444-448. |
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| 作者姓名： | 刘婷 闵乐泉 |
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| 作者单位： | 1. 北京科技大学自动化学院,北京,100083
2. 北京科技大学自动化学院,北京100083／北京科技大学数理学院,北京100083 |
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| 基金项目： | 国家自然科学基金资助项目(61074192) |
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| 摘 要： | 研究了基于Arnold变换的图像置乱算法的安全性问题.该算法使用两个不同的Arnold变换矩阵,分别对明文图像进行一次全局置乱和一次分割置乱.结果分析表明,该算法的密钥空间小,不足以抵抗穷举密钥攻击.在选择明文攻击下,导出了两次Arnold变换等效密钥之间的确定性关系.这一关系有效地降低了整个密码系统的密钥空间,从而可以用较小的计算代价获得密钥.理论和实验结果均表明,该密码系统不够安全.
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| 关 键 词： | 混沌密码 图像置乱 Kerckhoffs准则 选择明文攻击 |
The Cryptanalysis of an Image Scrambling Algorithm Based on Arnold Transformation |
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| LIU Ting,MIN Lequan.The Cryptanalysis of an Image Scrambling Algorithm Based on Arnold Transformation[J].JOurnal of Wuhan University:Natural Science Edition,2011,57(5):444-448. |
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| Authors: | LIU Ting MIN Lequan |
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| Institution: | LIU Ting1,MIN Lequan1,2(1.School of Automation,University of Science and Technology Beijing,Beijing 100083,China,2.School of Mathematics and Physics,China) |
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| Abstract: | The security of an Arnold transformation-based image scrambling algorithm is analyzed in this paper.One time global scrambling and one time intersected scrambling are carried on plain-images.The key space of the algorithm is too small to against the exhaust attacks based on the ciphertext-only attack.A deterministic relationship among equivalent keys of Arnold transformations is derived by the chosen-plaintext attack.The relationship can effectively decrease the key space of the whole cryptosystem,thereby o... |
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| Keywords: | chaotic cipher image scrambling Kerckhoffs principle chosen-plaintext attack |
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