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Image encryption algorithm based on hyper-chaotic system and dynamic S-box

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Abstract

Chaos based image encryption algorithm is a research hotspot in multimedia security area. In this paper, a hyper-chaos based image encryption algorithm is proposed. Firstly, a new hyper-chaotic system is constructed and its dynamic characteristics are analyzed. The proposed hyper-chaotic system has bigger Lyapunov exponent than many classical hyper-chaotic systems. Then this system is used to generate key-streams to permute and substitute the image pixels. In the encryption algorithm, a dynamic S-box is constructed to get good confusion effect. This S-box is based on the inverse operation in the algebraic structure Z 257. Moreover, this inverse operation is embedded into an affine transformation to complicate the algebraic expression of the S-box and improve its security. The analysis results show that the proposed algorithm performs well.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (60973162), the Natural Science Foundation of Shandong Province of China (ZR2014FM026, ZR2009GM037), the Science and Technology of Shandong Province, China (2013GGX10129, 2010GGX10132, 2012GGX10110), the Soft Science of Shandong Province, China (2012RKA10009), the National Cryptology Development Foundation of China (MMJJ201301006), the Foundation of Science and Technology on Information Assurance Laboratory (No. KJ-14-005) and the Engineering Technology and Research Center of Weihai Information Security.

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. School of Computer Science and Technology, Harbin Institute of Technology, Weihai, 264209, China

    Yang Liu & Xiaojun Tong

  2. Science and Technology on Information Assurance Laboratory, Beijing, 100072, China

    Jing Ma

Authors
  1. Yang Liu
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  2. Xiaojun Tong
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  3. Jing Ma
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Correspondence to Xiaojun Tong.

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Liu, Y., Tong, X. & Ma, J. Image encryption algorithm based on hyper-chaotic system and dynamic S-box. Multimed Tools Appl 75, 7739–7759 (2016). https://doi.org/10.1007/s11042-015-2691-5

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  • DOI: https://doi.org/10.1007/s11042-015-2691-5

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