【摘要】 基于4f双随机相位图像加密技术,采用多重栅距计算光栅密钥代替随机相位密钥,给出一种以有序代替无序的新型数字图像加密解密技术。通过控制计算光栅密钥的光栅常数、维度及栅距个数,最大限度的扰乱原始图像的频谱,保证加密的安全性,同时提高了加密解密的可控性,突破随机光学密钥难以复位的瓶颈,大大提高了光学密钥实际应用的可行性。更多还原

【Abstract】 Based on 4 f system of double random phase image encryption technology,a new image encryption technology is proposed with multiple lattice spacing mask replacing the random phase mask,in which the random phase mask is replaced by sepuential phase encoding mask. By controling grating key’s grating constant,dimensions and number of lattice spacing,try to disrupt the spectrum of the original image extremely,and guarantee the security of encryption,at the same time enhances the controllability of encryption to decrypt,break through the bottleneck of resetting random optical key,greatly improving the optical key feasibility of practical application.更多还原