NDLI: Efficient image encryption and decryption using discrete wavelet transform and fractional Fourier transform

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Efficient image encryption and decryption using discrete wavelet transform and fractional Fourier transform

Content Provider	ACM Digital Library
Author	Agarwal, Ankur Sharma, Prerana Mishra, Devesh
Abstract	We propose an algorithm that shows improvement in computation timeof existing image encryption-decryption methods. The algorithm also introduces additional one-level of encryption key into the existing methods. Image compression properties of the DWT (Discrete Wavelet Transform) are utilized to bring the improvement. The new algorithms retain MSE between input and decrypted images and the robustness of existing algorithms. We assume an image to be consisting of three primary color channels viz. R, G and B. An image is at first segregated into these channels and then these proposed methods compress input image channels by using $DWT_{2}$ (2-D Discrete Wavelet Transform). The compressed image channels are encrypted using 2-D FRT (The 2-D fractional Fourier transform) and random phase masks in two successive steps. The encrypted channels are merged using $IDWT_{2}$ (2-D Inverse Discrete Wavelet Transform), generating a color encrypted image. Decryption is the inverse of the encryption process. Simulations are performed and the results of these simulations verify the proposals made in the new algorithms.
Starting Page	153
Ending Page	157
Page Count	5
File Format	PDF
ISBN	9781450316682
DOI	10.1145/2388576.2388598
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-10-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Chaos Random phase mask Fractional fourier transform Wavelet transform Computational complexity
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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