| 一种基于分数阶傅里叶变换的改进图像加密算法 |
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| 引用本文： | 崔得龙,肖明,左敬龙.一种基于分数阶傅里叶变换的改进图像加密算法[J].成都信息工程学院学报,2010,25(1):22-25. |
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| 作者姓名： | 崔得龙 肖明 左敬龙 |
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| 作者单位： | 茂名学院计算机与电子信息学院,广东,茂名,525000 |
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| 摘 要： | 针对目前基于分数阶傅里叶变换的图像加密算法中存在的不足，设计了一种基于分数阶傅里叶变换和混沌系统的图像加密新算法。图像加密过程分两个步骤：首先将原始图像的分数阶傅里叶变换系数经过双随机相位加密，然后利用混沌系统生成的置乱矩阵对图像进行置乱加密后得到最终的加密图像。方案的安全性依赖于随机相位掩膜、分数阶傅里叶变换阶数以及混沌系统的初始参数。理论分析和模拟实验结果表明该方案具有良好的图像加密效果。
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| 关 键 词： | 信息安全 图像加密 分数阶傅里叶变换 双随机相位 混沌系统 置乱矩阵 |
A Modified Image Encryption Algorithm Based on Fractional Fourier Transform |
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| CUI De-long,XIAO Ming,ZUO Jing-long.A Modified Image Encryption Algorithm Based on Fractional Fourier Transform[J].Journal of Chengdu University of Information Technology,2010,25(1):22-25. |
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| Authors: | CUI De-long XIAO Ming ZUO Jing-long |
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| Institution: | CUI De-long,XIAO Ming,ZUO Jing-long(College of Computer , Electronic Information,Maoming University,Maoming 525000,China) |
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| Abstract: | In order to cope with the shortage of present image encryption algorithm,a novel image encryption algorithm based on chaotic system and fractional Fourier transform is proposed in this paper.The image encryption process includes two steps: first the image is encrypted by employing fractional Fourier through double random phase,then the confusion image is encrypted by using confusion matrix which is generated by chaotic system,and finally the cipher image is obtained.The security of the proposed algorithm de... |
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| Keywords: | information security image encryption fractional Fourier transform double random phase chaotic system confusion matrix |
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