A novel image encryption scheme based on an improper fractional-order chaotic system

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• 作者：Jianfeng Zhao ; Shuying Wang ; Yingxiang Chang ; Xianfeng Li
• 关键词：Image encryption ; Chaos ; Improper fractional ; Secret key
• 刊名：Nonlinear Dynamics
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：80
• 期：4
• 页码：1721-1729
• 全文大小：3,817 KB
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• 作者单位：Jianfeng Zhao (1)
  Shuying Wang (2)
  Yingxiang Chang (3)
  Xianfeng Li (4)
  
  1. Department of Information Engineering, Henan Polytechnic, Zhengzhou, China
  2. Department of Minzu, Huanghe Science and Technology College, Zhengzhou, China
  3. Department of Mathematics, Lanzhou Jiaotong University, Lanzhou, China
  4. Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China
  
• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Mechanics
  Mechanical Engineering
  Automotive and Aerospace Engineering and Traffic
  
• 出版者：Springer Netherlands
• ISSN：1573-269X

文摘

Based on the features of digital image encryption and high-dimensional chaotic sequences, the paper proposes a symmetric digital image encryption algorithm by a new improper fractional-order chaotic system. The initial conditions, parameters and fractional orders of chaos are influenced by gray value of all pixels and used as secret key. Therefore, the total key length is large enough to resist any brute-force attacks. The original image is divided into four parts and encrypted by different encryption formulas. Theoretical analysis results show that the proposed encryption scheme has effective encryption and efficiencies.