Image encryption based on double folding operation in fractional Fourier transform domain
Zhengjun Liu, Xiuying Wang, Shutian Liu · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2009
Based on fractional Fourier transform, the double folding operation is studied and introduced into image encryption. This method can implement a kind of the encoding with real number. This characteristic is convenient to the storage and transmission of the encrypted image. The corresponding experimental setup is similar to the scheme of double random phase encoding. With computer, some numerical simulations have been achieved. The analysis on the algorithm from the aspects of validity, security and robustness is made. The calculated results have been demonstrated that the algorithm is effective and has good security.