Image encryption using high-dimension chaotic system

This paper proposes a novel exponential hyper–chaotic system with complex dynamic behaviors. It also analyzes the chaotic attractor, bifurcation diagram, equilibrium points, Poincare map, Kaplan–Yorke dimension, and Lyapunov exponent behaviors. A fast terminal sliding mode control scheme is then designed to ensure the fast synchronization and stability of the new exponential hyper–chaotic system. Stability analysis was performed using the Lyapunov stability theory. One of the main features of the proposed controller is the finite time stability of the terminal sliding surface designed with high–order power function of error and derivative of error. The approach was implemented for image cryptosystem. Color image encryption was carried out to confirm the performance of the new hyper–chaotic system. For image encryption, the DNA encryption-based RGB algorithm was used. Performance assessment of the proposed approach confirmed the ability of the proposed hyper–chaotic system to increase the security of image encryption.

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Study on Image Encryption Algorithm Based on Logistic Chaotic System

Proceedings of the 2019 4th International Conference on Intelligent Information Processing ◽

10.1145/3378065.3378074 ◽

2019 ◽

Author(s):

Wen Dong

Keyword(s):

Image Encryption ◽

Chaotic System ◽

Encryption Algorithm ◽

Image Encryption Algorithm

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A new image encryption algorithm based on the OF-LSTMS and chaotic sequences

Scientific Reports ◽

10.1038/s41598-021-85377-1 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yi He ◽

Ying-Qian Zhang ◽

Xin He ◽

Xing-Yuan Wang

Keyword(s):

Image Encryption ◽

Fractional Order ◽

Chaotic System ◽

Short Term Memory ◽

Encryption Algorithm ◽

Chaotic Sequences ◽

Long Short Term Memory ◽

Input Gate ◽

And Diffusion ◽

Image Encryption Algorithm

AbstractIn this paper, a novel image encryption algorithm based on the Once Forward Long Short Term Memory Structure (OF-LSTMS) and the Two-Dimensional Coupled Map Lattice (2DCML) fractional-order chaotic system is proposed. The original image is divided into several image blocks, each of which is input into the OF-LSTMS as a pixel sub-sequence. According to the chaotic sequences generated by the 2DCML fractional-order chaotic system, the parameters of the input gate, output gate and memory unit of the OF-LSTMS are initialized, and the pixel positions are changed at the same time of changing the pixel values, achieving the synchronization of permutation and diffusion operations, which greatly improves the efficiency of image encryption and reduces the time consumption. In addition the 2DCML fractional-order chaotic system has better chaotic ergodicity and the values of chaotic sequences are larger than the traditional chaotic system. Therefore, it is very suitable to image encryption. Many simulation results show that the proposed scheme has higher security and efficiency comparing with previous schemes.

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