IMAGE ENCRYPTION BY USING THE BLOCK SCRAMBLING: A REVIEW PAPER

Abstract

The pictures are now transferred via open networks that are subject to possible attacks, so the sharing of image data in many areas, such as medical, military, banking, etc., requires additional protection. In preventing the system from brute force and differential attacks, safety factors are important. Although using chaotic maps and simple encryption techniques, such as block scrambling, modified zigzag transformation for encryption phases, including permutation, diffusion, and key stream generation, we propose an Enhanced Logistic Map (ELM) to withstand attacks. 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, the encryption results are evaluated. The safety, reliability, performance, and versatility of the proposed method are demonstrated by our results.