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工程设计学报
Chinese Journal of Engineering Design  2008, Vol. 15 Issue (4): 254-258    DOI:
    
Image encryption algorithm based on extended chaotic sequence
ZHANG Yong-hong
Department of Mathematics and Information Science,  Weinan Teacher's College, Weinan 714000, China
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Abstract  An algorithm to construct extended chaotic sequence was proposed and this sequence was applied in encryption of digital image. Two methods based on n degree Bézier curve and n degree rational Bézier curve to construct extended chaotic sequence were put forward, the constructed chaotic sequence had well pseudo-randomization. Through non-linear discretization treatment, corresponding integer pseudo-random sequence could be constructed, which would be utilized to encrypt digital image. Numerical experiments show that the chaotic sequence constructed by this algorithm has good encrypting effect on digital image, and this algorithm is simple and highly secure.

Key words： chaotic sequence      pseudo-random sequence      nonlinear dispersion      digital image      image encryption     
Published: 28 August 2008
CLC:  TP309.7  
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Cite this article:

ZHANG Yong-hong. Image encryption algorithm based on extended chaotic sequence. Chinese Journal of Engineering Design, 2008, 15(4): 254-258.

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https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2008/V15/I4/254


一种基于广义混沌序列的图像加密技术

给出一种构造广义混沌序列的方法, 并把该混沌序列应用于数字图像加密.基于n次Bézier曲线和n次有理Bézier曲线给出两种构造广义混沌序列的方法, 生成的混沌序列具有很好的伪随机性. 通过对混沌序列的非线性离散化处理, 可以生成相应的整数型伪随机序列, 利用该整数型混沌序列对数字图像进行加密.数字实验表明, 该算法生成的混沌序列对数字图像加密效果良好, 且该加密算法简单易行, 具有较好的安全性．

关键词： 混沌序列,  伪随机序列,  非线性离散化,  数字图像,  图像加密 
[1] ZHANG Yong-Hong. The technology of image encrypting based on ridgelet and chaotic system[J]. Chinese Journal of Engineering Design, 2010, 17(4): 289-292.