加密
混乱的
密码系统
算法
S盒
图像(数学)
计算机科学
密码学
密钥空间
确定性加密
概率加密
钥匙(锁)
数学
理论计算机科学
分组密码
人工智能
计算机安全
作者
Shenli Zhu,Guojun Wang,Congxu Zhu
出处
期刊:Entropy
[MDPI AG]
日期:2019-08-13
卷期号:21 (8): 790-790
被引量:71
摘要
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.
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