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

Entropy

Priya Ramasamy¹  Vidhyapriya Ranganathan²  Seifedine Kadry³  Tomas Blažauskas⁴  Robertas Damaševičius⁴ 

[1] Department of Applied Mathematics and Computational Sciences, PSG College of Technology, Coimbatore, TamilNadu 641004, India;Department of Biomedical Engineering, PSG College of Technology, Coimbatore, TamilNadu 641004, India;Department of Mathematics and Computer Science, Beirut Arab University, Beirut 11-5020, Lebanon;Department of Software Engineering, Kaunas University of Technology, Kaunas 51386, Lithuania;

关键词: image encryption;    chaotic system;    block scrambling;    modified zigzag transformation;    3D logistic map;    entropy analysis;   

DOI  :  10.3390/e21070656

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown