A Novel way of image encrption with piplining pixel scrambling and fractional fourier transform

Abstract

A novel way of image encryption based on fractional Fourier transforms (FRFT) and pixel scrambling technique is described and demonstrated in this paper. The idea of pixel scrambling is presented and an implementation to realize the pixel scrambling and decoding is also proposed. Numerical simulation results are given to verify the algorithm, and relative error (RE) between the decoded images and the original image versus the deviation of fractional orders is discussed. Comparing with single FRT encryption, the security using this method for optical image encryption is greatly improved due to the introduction of the pixel scrambling technique.