DRPE Image Encryption with Watermarking Using 2D-FrFT and Its Invariance Property: A Fusion-Based Hybrid Approach

In this paper, a hybrid approach of DRPE image encryption with Watermarking using 2D-Fractional Fourier Transform (FrFT) is presented, which uses the Invariance Property of 2D-FrFT to prevent frequency shift alterations. For complete reconstruction of image, Fusion with magnitude of FrFT of the image to the phase-only information is performed during the decryption. This method not only gives good reconstructed image, but also provides no loss for the watermark embedded. For general FrFT based Watermarked-DRPE Encryption, the secure transfer of Encryption keys is done using LSB based Steganography forming the hybrid approach of Watermarking, Steganography and Image Encryption. The security analysis and various evaluation parameters are also provided in this paper.