摘要： 提出一种彩色图像置乱算法，无须迭代计算即可得到加密图像。通过移位初步打乱行列像素间的相关性，在移位过程中，不同颜色分量采用不同移位参数，用分存方法提高安全性能。将图像分块，根据像素块内位置选择异或操作数，用异或操作改变像素值。理论分析和实验结果表明该算法有效可行、安全性好、速度比Arnold变换快。

关键词: 彩色图像, 图像置乱, 加密

Abstract: This paper proposes a scrambling scheme for color image without iterative computation. By shifting the rows and columns, the relativity among the adjacent pixels is scrambled. To improve the security, the method of storing color components in different pixels is applied. During the shift, different color components have different parameters. Then image is divided into blocks. XOR operation is used to alter the pixel value in each block and the operand of XOR is determined by the position of pixel. Theoretical analysis and experimental results show that the algorithm is effective and secure. It is faster than Arnold transform method.

Key words: color image, image scrambling, encryption

中图分类号: 

• TP309