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Article

A Secure and Fast Image Encryption Scheme Based on Double Chaotic S-Boxes

1
School of Computer Science, University of South China, Hengyang 421001, China
2
School of Computer Science, Guangzhou University, Guangzhou 510006, China
3
School of Computer Science and Engineering, Central South University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(8), 790; https://doi.org/10.3390/e21080790
Received: 22 July 2019 / Revised: 7 August 2019 / Accepted: 12 August 2019 / Published: 13 August 2019
(This article belongs to the Special Issue Entropy in Image Analysis II)
In order to improve the security and efficiency of image encryption systems comprehensively, a novel chaotic S-box based image encryption scheme is proposed. Firstly, a new compound chaotic system, Sine-Tent map, is proposed to widen the chaotic range and improve the chaotic performance of 1D discrete chaotic maps. As a result, the new compound chaotic system is more suitable for cryptosystem. Secondly, an efficient and simple method for generating S-boxes is proposed, which can greatly improve the efficiency of S-box production. Thirdly, a novel double S-box based image encryption algorithm is proposed. By introducing equivalent key sequences {r, t} related with image ciphertext, the proposed cryptosystem can resist the four classical types of attacks, which is an advantage over other S-box based encryption schemes. Furthermore, it enhanced the resistance of the system to differential analysis attack by two rounds of forward and backward confusion-diffusion operation with double S-boxes. The simulation results and security analysis verify the effectiveness of the proposed scheme. The new scheme has obvious efficiency advantages, which means that it has better application potential in real-time image encryption. View Full-Text
Keywords: image encryption; compound chaotic system; S-box; image information entropy image encryption; compound chaotic system; S-box; image information entropy
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MDPI and ACS Style

Zhu, S.; Wang, G.; Zhu, C. A Secure and Fast Image Encryption Scheme Based on Double Chaotic S-Boxes. Entropy 2019, 21, 790. https://doi.org/10.3390/e21080790

AMA Style

Zhu S, Wang G, Zhu C. A Secure and Fast Image Encryption Scheme Based on Double Chaotic S-Boxes. Entropy. 2019; 21(8):790. https://doi.org/10.3390/e21080790

Chicago/Turabian Style

Zhu, Shenli, Guojun Wang, and Congxu Zhu. 2019. "A Secure and Fast Image Encryption Scheme Based on Double Chaotic S-Boxes" Entropy 21, no. 8: 790. https://doi.org/10.3390/e21080790

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