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An Image Encryption Scheme Based on Block Scrambling, Modified Zigzag Transformation and Key Generation Using Enhanced Logistic—Tent Map

1
Department of Applied Mathematics and Computational Sciences, PSG College of Technology, Coimbatore, TamilNadu 641004, India
2
Department of Biomedical Engineering, PSG College of Technology, Coimbatore, TamilNadu 641004, India
3
Department of Mathematics and Computer Science, Beirut Arab University, Beirut 11-5020, Lebanon
4
Department of Software Engineering, Kaunas University of Technology, Kaunas 51386, Lithuania
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(7), 656; https://doi.org/10.3390/e21070656
Received: 10 May 2019 / Revised: 26 June 2019 / Accepted: 1 July 2019 / Published: 3 July 2019
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Abstract

Nowadays, the images are transferred through open channels that are subject to potential attacks, so the exchange of image data requires additional security in many fields, such as medical, military, banking, etc. The security factors are essential in preventing the system from brute force and differential attacks. We propose an Enhanced Logistic Map (ELM) while using chaotic maps and simple encryption techniques, such as block scrambling, modified zigzag transformation for encryption phases, including permutation, diffusion, and key stream generation to withstand the attacks. The results of encryption are evaluated while using the histogram, correlation analysis, Number of Pixel Change Rate (NPCR), Unified Average Change Intensity (UACI), Peak-Signal-to-Noise Ratio (PSNR), and entropy. Our results demonstrate the security, reliability, efficiency, and flexibility of the proposed method. View Full-Text
Keywords: image encryption; chaotic system; block scrambling; modified zigzag transformation; 3D logistic map; entropy analysis image encryption; chaotic system; block scrambling; modified zigzag transformation; 3D logistic map; entropy analysis
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Ramasamy, P.; Ranganathan, V.; Kadry, S.; Damaševičius, R.; Blažauskas, T. An Image Encryption Scheme Based on Block Scrambling, Modified Zigzag Transformation and Key Generation Using Enhanced Logistic—Tent Map. Entropy 2019, 21, 656.

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