| 基于混沌系统和分数阶傅里叶变换的图像加密算法 |
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| 引用本文： | 左敬龙,余桂兰,崔得龙. 基于混沌系统和分数阶傅里叶变换的图像加密算法[J]. 计算机与现代化, 2011, 0(7): 27-29,33. DOI: 10.3969/j.issn.1006-2475.2011.07.008 |
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| 作者姓名： | 左敬龙 余桂兰 崔得龙 |
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| 作者单位： | 广东石油化工学院计算机与电子信息学院,广东,茂名,525000 |
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| 基金项目： | 茂名市重点科技计划基金资助项目(203624) |
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| 摘 要： | 设计一种基于混沌系统和FRFT（Fractional Fourier Transform）的图像加密算法。图像加密过程分两个步骤：首先利用混沌系统生成的置乱矩阵对图像进行置乱加密,然后利用FRFT将置乱加密的图像进行双随机相位加密得到最终的加密图像。该方案的安全性依赖于混沌系统的参数敏感性、相位掩膜和FRFT阶的随机性。理论分析和仿真实验表明,该方案具有良好的图像加密效果。
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| 关 键 词： | 图像加密 混沌系统 分数阶傅里叶变换 置乱矩阵 双随机相位 |
An Image Encryption Algorithm Based on Chaotic System and Fractional Fourier Transform |
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| ZUO Jing-long,YU Gui-lan,CUI De-long. An Image Encryption Algorithm Based on Chaotic System and Fractional Fourier Transform[J]. Computer and Modernization, 2011, 0(7): 27-29,33. DOI: 10.3969/j.issn.1006-2475.2011.07.008 |
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| Authors: | ZUO Jing-long YU Gui-lan CUI De-long |
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| Affiliation: | ZUO Jing-long,YU Gui-lan,CUI De-long(College of Computer and Electronic Information,Guangdong University of Petrochemical Technology,Maoming 525000,China) |
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| Abstract: | An image encryption algorithm based on chaotic system and fractional Fourier transform is proposed.The image encryption process includes the two steps: first the image is encrypted by using confusion matrix which is generated by chaotic system,then the confusion image is encrypted by employing Fractional Fourier domain double random phase,finally the cipher image is obtained.The security of the proposed algorithm depends on the sensitivity to initial conditions of chaotic system,the randomness of phase mask... |
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| Keywords: | image encryption chaotic system fractional Fourier transform confusion matrix double random phase |
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