Six Security Key For Image Encryption Based on Anamorphic Fractional Fourier Transform
基于变形分数傅里叶变换的六重密钥图像加密

A new optical image encryption method using anamorphic fractional Fourier transform and double random phase encoding is proposed.In this method,the image is transformed two times with anamorphic fractional Fourier transform and modulated two times by random phase function in the original image plane and the fractional domain separately.The number of security keys is increased from two to six,so the security intensity can be improved greatly.This encryption and decryption method can be implemented by optical system using HOE.The digital computation experiment showed only when the six security keys are exactly right,can the original image be reconstructed.