Study on image encryption of multi-stage chaotic system with variable parameters

doi:10.3778/j.issn.1002-8331.2010.23.030

Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (23): 106-110.DOI: 10.3778/j.issn.1002-8331.2010.23.030

• 网络、通信、安全 • Previous Articles Next Articles

Study on image encryption of multi-stage chaotic system with variable parameters

ZHOU Zhi-gang^1，2，XU Jiang-feng¹，LIU Yi¹

1.School of Information Engineering，Zhengzhou University，Zhengzhou 450001，China
2.Information Section，Henan Provincial Hospital of Traditional Chinese Medicine，Zhengzhou 450002，China

Received:2009-01-15 Revised:2009-03-23 Online:2010-08-11 Published:2010-08-11
Contact: ZHOU Zhi-gang

一种多级变参数混沌系统的图像加密研究

周志刚^1，2，徐江峰¹，刘嫕¹

1.郑州大学信息工程学院，郑州 450001
2.河南省中医院信息科，郑州 450002

通讯作者: 周志刚

Abstract

Abstract: Because the computer limited precision effect introduces the chaos degeneration question in a single one-dimensional discrete chaotic system，this paper proposes a method of pseudo-random sequence generation with variable parameters in the process of the generation of the chaotic signal.Compared to one chaos system，the chaos system based on this method has the big pseudo-random sequence cycle，more key quantity，and bigger key space.And the password has a higher safety performance.Based on the pseudo-random sequence generation method，it also puts forward a new image encryption algorithm.The simulation results show that this algorithm is simple，safe，easy to achieve with software and hardware.

Key words: chaotic system, random changes in the parameters, pseudo-random series, image encryption

摘要： 针对一维离散单混沌系统在计算机有限精度下存在的退化问题，提出了一种在生成混沌信号的过程中参数随机变化的混沌伪随机序列产生方法，基于该方法构建的混沌系统较单混沌系统具有伪随机序列周期大，密钥数量多，密钥空间大等优势，所产生的密码具有更高的安全性能。而且基于该伪随机序列产生方法，还提出了一种新的图像加密算法。仿真分析证明，该图像加密算法原理简单、安全性高、便于软硬件实现。

关键词: 混沌系统, 参数随机变化, 伪随机序列, 图像加密

CLC Number:

TP309

ZHOU Zhi-gang^1，2，XU Jiang-feng¹，LIU Yi¹. Study on image encryption of multi-stage chaotic system with variable parameters[J]. Computer Engineering and Applications, 2010, 46(23): 106-110.

周志刚^1，2，徐江峰¹，刘嫕¹. 一种多级变参数混沌系统的图像加密研究[J]. 计算机工程与应用, 2010, 46(23): 106-110.

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Study on image encryption of multi-stage chaotic system with variable parameters

一种多级变参数混沌系统的图像加密研究

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