Encryption technology for hologram of optical system
Zhang Qiu-xia · Information technology newsletter · 2010
This paper presents a algorithm of image encryption based on fractional Fouvier transform,Fresnel diffraction transform and two phase encryption boards,which act the image,a hologram is got by the incident light shining it,which does not identify.When all encryp key are correct,it is decrypt.The image encryption with this method,the encrypt key increoses from four steps to five steps.The encryp level of the image is improved.