Efficient transmission of encrypted images with OFDM system

摘要

In this paper, an efficient way for transmission of encrypted images with a Fast Fourier Transform (FFT) version of Orthogonal Frequency Division Multiplexing (OFDM) system is studied. A comparison between encrypted images transmitted with FFT-OFDM system by using two famous encryption algorithms (i.e Data Encryption Standard (DES) and Advanced Encryption Standard (AES)) is presented. The aim of this comparison is to select the most appropriate encryption algorithm for efficient transmission of encrypted images. While performing the simulation experiments, the peak signal-to-noise ratio (PSNR) at the receiver is considered as an evaluation metric for examining the decrypted image quality. From simulation results, it has been observed that, DES encryption algorithm is very much efficient in transmitting encrypted images through FFT-OFDM system over wireless radio channel.