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基于二維廣義Logistic映射和反饋輸出的圖像加密算法

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成果類型:
期刊論文
論文標題(英文):
A novel image encryption algorithm based on two-dimensional general Logostic mapping and output-feedback
作者:
涂立;張弛;張應征;賈麗媛
通訊作者:
Tu, L.(tulip1903@163.com)
作者機構:
[涂立] School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
[涂立; 賈麗媛; 張弛] School of Information Science and Engineering, Hunan City University, Yiyang 413000, China
[張應征] Department of Information and Engineering, Hunan Engineering Polytechnic, Changsha 410004, China
通訊機構:
School of Computer Science and Technology, Huazhong University of Science and Technology, China
語種:
中文
關鍵詞:
蟲口模型;圖像加密;輸出反饋
關鍵詞(英文):
insect population model;image encryption;output-feedback
期刊:
中南大學學報. 自然科學版
期刊(英文):
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
ISSN:
1672-7207
年:
2014
卷:
45
期:
6
頁碼:
1893-1899
基金類別:
國家自然科學基金資助項目(61374086); 湖南省科技計劃項目(2013FJ3087,2012FJ4329);
機構署名:
本校為其他機構
院系歸屬:
信息與電子工程學院
摘要:
提出一個利用廣義Logistic 映射構造的二維非線性混沌映射,采用相圖、分岔圖分析方法,研究該混沌映射的非線性動態特性;利用該二維混沌方程生成混沌序列,將混沌序列進行優化改進,生成密鑰序列;采用輸出反饋的加密方式,改變圖像的像素,達到加密的目的。實驗仿真結果表明:該加密算法對明文和密文都非常敏感,混沌序列的選擇極其敏感地依賴于明文,有效地提高了抵御選擇明文攻擊的能力;密文圖像信息熵為7.974 3,接近理想值8.000 0,因而加密圖像像素具有類隨機均勻分布特性;加密圖像和明文圖像之間的相關性非常小,相鄰像素具有零相關特性,而且密鑰空間達到299 bit,加密方法大大改變了明文圖像的像素,使得密文能夠抵御統計攻擊;本算法有很高的安全性,具有良好的加密效果。
摘要(英文):
A nonlinear coupled two-dimensional generalized Logistic chaotic mapping was proposed by using phase maps and bifurcation graphics, and the complex nonlinear dynamic activities of two-dimensional formula were studied. By using the coupled two-dimensional generalized Logistic chaotic mapping a chaotic sequence was generated, then the chaotic sequence was optimized into secret key stream, and output-feedback technology was introduced in this encryption algorithm, which changes pixels. The results show that the encryption algorithm is extremely sensitive to the key and the encrypted image, the choice of chaotic sequence sensitively depends on the plaintext that enhances the ability of resisting the chosen plaintext attack, and the information entropy of the cipher image is 7.9743, which is very close to the ideal value 8.0000. The encrypted image has random-like distribution behavior of grey values, and the correlation between the encrypted image and the plain image is close to 0. The adjacent pixels have zero co-correlat ion properties, and the encryption method changes the pixel of the original image greatly, which makes the ciphertext resist statistical attack, and the algorithm has the advantages of large space, and the key space reaches 299 bit.

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