Breaking a novel colour image encryption algorithm based on chaos
Breaking a novel colour image encryption algorithm based on chaos
复制标题
突破一种新颖的基于混沌的彩色图像加密算法
DOI：
10.1007/s11071-012-0626-5
复制
发表时间：
2012-12-01
影响因子：
5.6
通讯作者：
Shu, Shi
中科院分区：
文献类型：
--
作者：
Li, Chengqing;Zhang, Leo Yu;Shu, Shi
最近，提出了一种基于混沌的彩色图像加密算法，该算法通过迭代Logistic映射产生的伪随机数序列来确定两个位置置换操作和一个替换操作。本文对该加密算法的安全性进行了评估，发现仅位置置换部分和替换部分可分别被破解，每千个和2个选择的平面图像分别只有aOE（log（2）（3 MN））/8aOE部分，其中MN是平面图像的大小。理论分析和实验结果都表明了所提出的选择明文攻击的有效性。
Recently, a colour image encryption algorithm based on chaos was proposed by cascading two position permutation operations and one substitution operation, which are all determined by some pseudo-random number sequences generated by iterating the logistic map. This paper evaluates the security level of this encryption algorithm and finds that the position permutation-only part and the substitution part can be separately broken with only aOE(log(2)(3MN))/8aOE parts per thousand and 2 chosen plain-images, respectively, where MN is the size of the plain-image. The effectiveness of the proposed chosen-plaintext attack is supported by concise theoretical analyses, and is verified by experimental results.