Chaotic Image Encryption Algorithm Based on Circulant Operation

被引:7
作者
Huang, Xiaoling [1 ]
Ye, Guodong [1 ,2 ]
Wong, Kwok-Wo [2 ]
机构
[1] Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China
[2] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
TOEPLITZ; SEQUENCE;
D O I
10.1155/2013/384067
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A novel chaotic image encryption scheme based on the time-delay Lorenz system is presented in this paper with the description of Circulant matrix. Making use of the chaotic sequence generated by the time-delay Lorenz system, the pixel permutation is carried out in diagonal and antidiagonal directions according to the first and second components. Then, a pseudorandom chaotic sequence is generated again from time-delay Lorenz system using all components. Modular operation is further employed for diffusion by blocks, in which the control parameter is generated depending on the plain-image. Numerical experiments show that the proposed scheme possesses the properties of a large key space to resist brute-force attack, sensitive dependence on secret keys, uniform distribution of gray values in the cipher-image, and zero correlation between two adjacent cipher-image pixels. Therefore, it can be adopted as an effective and fast image encryption algorithm.
引用
收藏
页数:8
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