基于离散小波变换的分组图像加密算法

摘要

针对计算机软件图像加密技术中速度不高效率低下的问题,提出了一种基于FPGA的硬件加密方法,该方法基于密码链接模式的图像置换算法以及改进Baker图像置乱算法,只需采用少次迭代,就可以改变加密图像的像素改变率和一致平均改变强度,提高加密图像抵抗差分攻击的能力.%Being low speed of image encryption technology,the paper proposes a hardware encryption method based on FPGA,which is based on the password linking model of image replacement algorithm and improves Baker image scrambling algorithm.Using less iteration,we can change the encrypted image pixel changing rate and the average changing intensity,to improve the ability against the attack.