基于Cubic-Sine混沌系统的遥感图像多波段加密算法

A multi-band remote sensing image encryption algorithm based on Cubic-Sine chaotic system

摘要:

针对遥感图像在加密中存在的适应性低、安全性差等问题,提出一种基于新的二维混沌系统的多波段遥感图像加密算法。首先,为增强混沌序列的随机性,使用Cubic映射与Sine映射设计出一种新的二维混沌系统,并通过实验验证其性能优于以往混沌系统。其次,为了提高加密算法中置乱与扩散部分的性能与安全性,引入了基于循环群特性的像素替换策略。此外,该算法充分利用了遥感图像的多波段特性,在加密过程中令每个波段之间相互交叉混淆,优化了加密效果。实验结果表明,该算法具有密钥空间大、安全性高的优点,能够抵御常见的密码分析攻击。

Abstract:

To address the problems of poor adaptability and weak security in the encryption of remote sensing images,this paper proposes a multi-band remote sensing image encryption algorithm based on a novel two-dimensional chaotic system.First,to enhance the randomness of the chaotic sequence,we design a new two-dimensional chaotic system using Cubic and Sine mappings.Experiments verify that its performance surpasses that of previous chaotic systems.Second,to enhance the performance and security of the shuffling and diffusion phases in the encryption algorithm,we introduce a pixel replacement method based on the characterics of cyclic groups.Furthermore,this algorithm fully leverages the multi-band characteristics of remote sensing images and optimizes the encryption effect by enabling each band to cross-confuse with others during the encryption process.Experimental results demonstrate that the algorithm offers a large key space and high security,making it resilient to common cryptanalytic attacks.