基于线性变换的彩色数字图像置乱算法

Color Digital Image Scrambling Algorithm Based on Linear Transformation

针对传统的彩色数字图像置乱算法存在的密钥空间小,抗攻击性弱,加密强度低等问题,本文提出了一种新的基于线性变换的彩色数字图像置乱算法。该算法使用3个随机生成的矩阵与原彩色数字图像的三个RGB矩阵进行运算,既改变了像素值又改变了像素的位置,达到像素置乱的目的。仿真结果表明,该算法能够改变图像的灰度图像特征,具有稳定性,随机性强,抗攻击性强等优点。

There are some problems that traditional color digital image scrambling algorithm has: small key space, weak anti-attack and low encryption intensity. In this paper, we present a new algorithm of color digital image scrambling algorithm based on linear transformation. In order to achieve the purpose of pixel scrambling, it randomly generates three matrices, operates with the three RGB matrices of the original color digital image, and then it will disrupt the position of the pixel scrambling. The simulation results show that the algorithm can change the gray image features of image, and has the advantages of stability, strong randomness and strong anti-attack.