自适应复合混沌映射的彩色图像加密方案

Color image encryption scheme based on self-adaptive compound chaotic map

文章提出了一种复合最近邻耦合映射格子和分段非线性混沌映射的方法,并将提出的复合混沌映射方法应用到数字图像加密技术中,设计了一种自适应复合混沌映射的彩色图像加密方案。彩色图像加密时,首先利用外部密钥、复合混沌映射和自适应加密技术,对原始图像进行加密,然后再通过布尔矩阵运算对图像进行进一步加密。安全性能分析结果表明:该方案具有高安全性、高灵敏度、密钥空间大等优点,适合对安全性有较高要求的实时图像加密。

This paper proposes a method based on nearest-neighboring coupled-map lattices （NCML） and piecewise nonlinear chaotic map, and a self-adaptive compound chaotic mapping color image encryption algorithm is designed. First the original image encryption is completed by external key, compound chaotic mapping and self-adaptive encryption technology, and then the final image encryption is completed by the Boolean matrix operation. The analysis results of security performance demonstrate that the proposed scheme has high security level, high sensitivity and large key space, suitable for real-time image encryption with higher security requirements.