Image Encryption Using Discrete Fourier Transform and Fractional Fourier Transform
Ashutosh1, Deepak Sharma2
1Ashutosh, Department of Electronics and Communication, Jaypee University of Engg. And Technology, Guna, India.
2Deepak Sharma, Department of Electronics and Communication, Jaypee University of Engg. And Technology, Guna, India.
Manuscript received on March 02, 2013. | Revised Manuscript received on April 13, 2013. | Manuscript published on April 30, 2013. | PP: 886-890 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1590042413/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Growing with the fast evolution of digital data exchange, security information becomes much important in data storage and transmission. Due to the increasing use of images in industrial process, it is essential to protect the confidential image data from unauthorized access. The security system based on the fractional Fourier transform (FRFT) is protected by only a certain order of FRFT. In this paper, we proposed a novel method to encrypt an image by using Discrete Fourier Transform (DFT) and Fractional Fourier Transform (FRFT). In this paper, we analyze the image encryption using DFT and FRFT based on double random phase matrix. The implementation of both techniques has been realized for experimental purposes. Detailed results in terms of security analysis and implementation are given. Comparative study with traditional encryption algorithms is shown the superiority. The proposed encoding scheme significantly enhances the data security in comparatively than DFT and FRFT.
Keywords: Discrete Fourier Transform (DFT), Decryption, Encryption, Fourier Transform (FT), Fractional Fourier Transform (FRFT).