Robust Technique for Image Encryption and Decryption Using Discrete Fractional Fourier Transform with Random Phase Masking

摘要

Encryption is one of the well known techniques to provide security in transmission of multimedia contents over the internet and wireless networks. There is use of image in all the area so its security is of great concern now a day. To focus on security aspect, In this paper we proposed a novel method of image encryption using discrete fractional Fourier transform (DFRFT) using exponential random phase mask. Encrypting with this technique makes it almost impossible to retrieve the image without using both the right keys. DFRFT is the generalization of the Discrete Fourier transform (DFT). This technique has been implemented and results are discussed in detail with analyzing parameters like Security, sensitivity and MSE.