| 像素位置与比特双重置乱的混沌图像加密算法简 |
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| 引用本文： | 廖春成,周小平,廖春龙,徐景涛.像素位置与比特双重置乱的混沌图像加密算法简[J].中国科技论文在线,2014(1):112-116. |
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| 作者姓名： | 廖春成 周小平 廖春龙 徐景涛 |
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| 作者单位： | [1]北京建筑大学电气与信息工程学院,北京100044 [2]北京市建筑安全监测工程技术研究中心,北京100044 [3]中南大学信息科学与工程学院,长沙410083 [4]河南许继仪表有限公司技术中心,河南许昌461000 |
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| 基金项目： | 北京市青年英才计划项目（YETP1660）;北京建筑大学校级实践教学专项基金项目（J12-10） |
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| 摘 要： | 分析当前流行的一类基于混沌序列置乱像素位置和像素值加密的混沌算法的安全性的不足，提出了一种抗选择明（密）文攻击的图像加密新算法。采用Kent混沌系统，根据明文像素值的特征和输入的密钥共同产生混沌系统的参数和预迭代次数，首先用混沌序列实现图像像素位置的全局置乱；其次，用另一个混沌序列实现对图像像素值中0、1比特位置乱。混沌序列的产生都与图像本身的内容自适应。仿真实验结果表明，该算法既克服了以往算法不能抵抗选择明（密）文攻击的缺陷，又具有良好的图像加密性能。
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| 关 键 词： | 图像置乱 比特位置乱 混沌加密 |
Chaotic image encryption algorithm based on dual scrambling of pixel position and bits |
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| Liao Chuncheng,Zhou Xiaoping,Liao Chunlong,Xu Jingtao.Chaotic image encryption algorithm based on dual scrambling of pixel position and bits[J].Sciencepaper Online,2014(1):112-116. |
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| Authors: | Liao Chuncheng Zhou Xiaoping Liao Chunlong Xu Jingtao |
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| Institution: | 1. School of Electricity and Information Engineering, Beijing University of Civil Engineering and Architecture, Bei j ing 100044, China ;2. Bei j ing Engineering Research Center of Monitoring for Construction Safety, Bei j ing 100044, China ; 3. School of Information Science and Engineering, Central South University,Changsha 410083, China 4. Henan Xuji Metering Co. , Ltd. , Xuchang,Henan 461000, China) |
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| Abstract: | We analyze the safety of a chaotic encryption algorithm which is very popular nowadays,based on chaotic sequences scrambling pixel position and pixels encryption,and propose a new image encryption algorithm which is resistant to known-plain-text and chosen-plaintext attacks.The algorithm uses Kent chaotic system to produce the parameters of the chaotic system and the iteration times based on the features of plaintext pixel and input key.Firstly,the global position scrambling is achieved with the chaotic sequence image pixels.Second,the other chaotic sequence is used to scramble the 0,1 bit position of image pixels. Chaotic sequence is produced adapting to the image.Simulation results show that the algorithm is not only resistant to known-plaintext and chosen-plaintext attacks,but also has good image encryption performance. |
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| Keywords: | image scrambling bits scrambling chaotic encryption |
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