Fan Chunlei, Ding Qun
Electrical Engineering College, Heilongjiang University, Harbin 150080, China.
Entropy (Basel). 2018 Jun 6;20(6):445. doi: 10.3390/e20060445.
In this paper, a novel image encryption scheme is proposed for the secure transmission of image data. A self-synchronous chaotic stream cipher is designed with the purpose of resisting active attack and ensures the limited error propagation of image data. Two-dimensional discrete wavelet transform and Arnold mapping are used to scramble the pixel value of the original image. A four-dimensional hyperchaotic system with four positive Lyapunov exponents serve as the chaotic sequence generator of the self-synchronous stream cipher in order to enhance the security and complexity of the image encryption system. Finally, the simulation experiment results show that this image encryption scheme is both reliable and secure.
本文提出了一种用于图像数据安全传输的新型图像加密方案。设计了一种自同步混沌流密码，旨在抵抗主动攻击并确保图像数据的有限错误传播。利用二维离散小波变换和Arnold映射对原始图像的像素值进行置乱。采用具有四个正Lyapunov指数的四维超混沌系统作为自同步流密码的混沌序列发生器，以提高图像加密系统的安全性和复杂性。最后，仿真实验结果表明该图像加密方案既可靠又安全。
