Optical image encryption based on multifractional Fourier transforms
Banghe Zhu, Shutian Liu, Qiwen Ran · Optics Letters · 2000
We propose a new image encryption algorithm based on a generalized fractional Fourier transform, to which we refer as a multifractional Fourier transform. We encrypt the input image simply by performing the multifractional Fourier transform with two keys. Numerical simulation results are given to verify the algorithm, and an optical implementation setup is also suggested.