| 双混沌系统图像加密方案 |
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| 引用本文： | 陈光喜,王瑛皓,曾振柄.双混沌系统图像加密方案[J].计算机工程与应用,2009,45(34):101-103. |
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| 作者姓名： | 陈光喜 王瑛皓 曾振柄 |
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| 作者单位： | 1. 桂林电子科技大学数学与计算科学学院,广西,桂林,541004
2. 华东师范大学软件学院,上海,200062 |
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| 基金项目： | 国家自然科学基金，广西研究生科研创新项目 |
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| 摘 要： | 提出一种基于baker映射置乱、Logistic映射和Lorenz方程相结合的双混沌系统的图像加密算法。通过对图像分块,引入随机坐标,避免baker映射将(0,0)映射到自身;将Logistic映射和Lorenz方程相结合构造双混沌映射序列,结合baker映射实现图像加密。算法可缩短单个加密序列的长度,降低单混沌映射引起的退化风险,从而提高了加密算法的安全性。实验证明算法对密钥的敏感度强,能抵御各种攻击。
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| 关 键 词： | 图像加密 混沌映射 baker映射 双混沌系统 |
| 收稿时间： | 2008-7-9 |
| 修稿时间： | 2008-11-27
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Two-chaotic system image encryption schemes |
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| CHEN Guang-xi,WANG Ying-hao,ZENG Zhen-bing.Two-chaotic system image encryption schemes[J].Computer Engineering and Applications,2009,45(34):101-103. |
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| Authors: | CHEN Guang-xi WANG Ying-hao ZENG Zhen-bing |
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| Affiliation: | 1.College of Computing Science and Mathematics，Guilin University of Electronic Technology，Guilin，Guangxi 541004，China 2.Software Engineering Institute，East China Normal University，Shanghai 200062，China |
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| Abstract: | An image encryption algorithm based on Baker map and two-chaotic system（Logistic dynamic system and Lorenz dynamic system） is presented.The algorithm splits the original image into small blocks and uses a random point as start point in baker map.The two-chaotic sequence，built with logistic system and Lorenz equation，combines with baker map to implement image encryption.This new algorithm can reduce the length of encryption sequence and enhance security of encryption.Experiments show that the algorithm is sensitive to encryption keys and can resist differential attacks. |
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| Keywords: | image encryption chaotic map baker map two-chaotic system |
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