Abstract：In order to improve the small key space of the encryption algorithm based on low-dimensional system design, a new five-dimensional complex chaotic system is constructed, and its chaotic dynamics properties are studied by using phase diagram, equilibrium point, Lyapunov exponential spectrum, bifurcation diagram and spectral entropy complexity. It is found that the dynamic behavior of this system is rich, and it is more suitable for image encryption algorithm than low-dimensional system. Furthermore, based on this system, a new encryption scheme is proposed in this paper. The scheme includes three diffusion and one scrambling, which can increase the security of image transmission. Finally, the performance of the encryption scheme is analyzed by calculating key space, information entropy, correlation of adjacent pixels and so on. The analysis results show that the encryption scheme designed in this paper has a large key space, good encryption effect and the ability to resist external attacks.
王越, 安新磊, 施倩倩, 刘思洋. 基于一个复混沌系统的图像加密算法[J]. 复杂系统与复杂性科学, 2024, 21(3): 77-84.
WANG Yue, AN Xinlei, SHI Qianqian, LIU Siyang. Image Encryption Algorithm Based on a Complex Chaotic System[J]. Complex Systems and Complexity Science, 2024, 21(3): 77-84.
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