Research on digital image encryption algorithm based on fractional Fourier transform
Shangbo Zhou · Jisuanji yingyong yanjiu · 2011
This paper proposed a new approach of digital image encryption based on the fractional Fourier transform and chaos.The algorithm could be summarized as follows.Firstly,scrambled the image in time domain with chaos,and then combined it and the discrete fractional Fourier transform in X direction.Secondly,scrambled the image obtained in the fractional Fourier domain with chaos,and then combined it and the discrete fractional Fourier transform in Y direction.Finally,mapped the real and image part of the encrypted image to the RGB,forming a color image for transmission.The experiment results show that the algorithm performs considerable security,which has well research value and application foreground in the information security field.