《计算机应用研究》|Application Research of Computers

对一维复合混沌图像加密算法的安全分析和改进

Cryptanalysis and enhancements of image encryption algorithm based on combination of 1D chaotic map

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作者 朱淑芹,王文宏
机构 聊城大学 计算机学院,山东 聊城 252059
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文章编号 1001-3695(2019)08-040-2432-04
DOI 10.19734/j.issn.1001-3695.2018.01.0101
摘要 针对Park等人提出的基于一维复合混沌的图像加密算法进行了安全性分析,发现该算法的两个等效密钥流,从而使得循坏移位操作成为无效操作。通过选择明文攻击依次破解出算法中的两个等效密钥流,恢复出了明文图像。理论分析和实验结果验证了选择明文攻击策略的可行性;此外提出了一种改进算法,克服了原有算法的缺陷。改进后的方案不仅能保持原算法的优点,还能抵抗选择明文的攻击。
关键词 混沌; 图像加密; 密码分析; 循环移位; 选择明文攻击
基金项目 山东省自然科学基金资助项目(ZR2017MEM019)
聊城大学自然科学基金资助项目(318011606)
山东省高校科研计划资助项目(J18KA336)
本文URL http://www.arocmag.com/article/01-2019-08-040.html
英文标题 Cryptanalysis and enhancements of image encryption algorithm based on combination of 1D chaotic map
作者英文名 Zhu Shuqin, Wang Wenhong
机构英文名 School of Computer Science,Liaocheng University,Liaocheng Shandong 252059,China
英文摘要 Park et al proposed an image encryption algorithm using combination of the 1D chaotic map, it shifted the diffused of the ciphertext sequence to the left to get the final ciphertext. This paper carried out the security analysis of the encryption algorithm, and found the two equivalent key streams of the algorithm, which made the shift shift operation an invalid operation. By selecting the plaintext attack, it broke two equivalent key streams in the algorithm in turn, so it could restore the plaintext image. Theoretical analysis and experimental results verify the feasibility of the chosen plaintext attack strategy. In addition, it proposed an improved algorithm to overcome the defects in the above original algorithm. Experimental results show that the improved scheme can not only maintain the merits of the original one, but also resist the attacks.
英文关键词 chaos; image encryption; cryptanalysis; circular shift; chosen plaintext attack
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收稿日期 2018/1/30
修回日期 2018/3/16
页码 2432-2435
中图分类号 TP309.7
文献标志码 A