【摘要】 基于坐标变换的图像置乱是一种图像加密技术。提出一种基于图像矩阵循环移位操作的灰度图像置乱方法,循环移动位数的随机性增加了变换的无规律性,提高了算法的抗攻击能力。算法原理简单、易于实现,对图像大小没有限制。理论分析和实验仿真表明,算法具有良好的安全性和可操作性。更多还原

【Abstract】 Image scrambling based on coordinate transformation was a kind of image encryption technologies.This paper put forward a scrambling method for gray image based on image matrix’s circular shifting,the random-bit of circle shifting increased non-regularity of the transformation,improved the algorithm’s ability of anti-attacking.The algorithm had a simple principle and easy to implement,and had no restriction on image size.Theoretical analysis and simulation experiments show that the algorithm has good security and maneuverability.更多还原