Image encryption using quad phase masks in fractional Fourier domain and case study

A Technique for the encryption of the image is proposed using the random phase masks and fractional Fourier transform. The method uses four random phase masks and two fractional orders that act as the encryption key. The encryption scheme transmits the data to the authorised user maintaining its integrity and confidentiality. Numerical simulations results have been carried out to validate the algorithm and its Mean Square Error (MSE) is calculated. Furthermore, an image is divided in to four sections and on each of the section of the image different algorithms are applied and then there encryption and the decryption time is studied and also their MSE are calculated and compared to find an algorithm which is most optimal.