| 结合多混沌映射和输出反馈的图像加密算法 |
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| 引用本文： | 朱从旭,黄大足,郭迎.结合多混沌映射和输出反馈的图像加密算法[J].武汉大学学报(信息科学版),2010(5). |
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| 作者姓名： | 朱从旭 黄大足 郭迎 |
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| 作者单位： | 中南大学信息科学与工程学院;湖南财经高等专科学校信息管理系; |
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| 基金项目： | 国家自然科学基金资助项目(60902044); 中南大学首批研究生培养扶植基金资助项目(71333000482) |
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| 摘 要： | 提出了一种结合多个Logistic混沌映射和逐段正弦混沌映射的图像加密算法。通过m个Logistic混沌映射的多次迭代,分别产生m个分段正弦混沌映射的初值和参数值,由m个分段正弦混沌映射迭代产生图像加密密钥序列,并引入密文输出反馈机制,对图像像素值逐点进行2轮异或加密。实验表明,该算法使密文对明文和密钥都充分敏感,加密图像像素值具有类随机均匀分布特性,相邻像素具有零相关特性,而且算法具有密钥空间大、加密速度快的优越性。
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| 关 键 词： | 图像加密 Logistic混沌映射 正弦混沌映射 输出反馈 |
A New Image Encryption Algorithm Based on Multiple Chaotic Maps and Output-Feedback |
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| ZHU Congxu HUANG Dazu, GUO Ying.A New Image Encryption Algorithm Based on Multiple Chaotic Maps and Output-Feedback[J].Geomatics and Information Science of Wuhan University,2010(5). |
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| Authors: | ZHU Congxu HUANG Dazu GUO Ying |
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| Institution: | ZHU Congxu1 HUANG Dazu1,2 GUO Ying1(1 School of Information Science , Engineering,Central South University,932 South Lushan Road,Changsha 410083,China)(2 Department of Information Management,Hunan College of Finance , Economics,139 Fenglin Road,Changsha 410205,China) |
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| Abstract: | A new chaotic image encryption algorithm based on multi logistic maps(LMs) and piecewise sine chaotic maps(PSCMs) is proposed.The initial values and system parameters of the m PSCMs are generated by four LMs via iteration.By using the m-PSCMs chaotic secret key stream are generated.The image is encrypted two rounds by the chaotic secret key stream pixel by pixel and ciphertext output-feedback technology is introduced.The experimental results demonstrate that the extremely sensitive to the key and the plaint... |
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| Keywords: | image encryption Logistic chaotic maps sine chaotic maps output-feedback |
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