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Chaotic Image Encryption Algorithm Based on Circulant Operation

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  • Xiaoling Huang
  • Guodong Ye
  • Kwok-Wo Wong

Abstract

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.

Suggested Citation

  • Xiaoling Huang & Guodong Ye & Kwok-Wo Wong, 2013. "Chaotic Image Encryption Algorithm Based on Circulant Operation," Abstract and Applied Analysis, Hindawi, vol. 2013, pages 1-8, July.
    • Handle: RePEc:hin:jnlaaa:384067
    DOI: 10.1155/2013/384067
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