Thesa Adi Saputra Yusri, Vivin Sativa Putri, Bambang Sumarno Hadi Marwoto, Lusi Harini, Deddy Rudhistiar
This study proposes a novel digital image encryption scheme that integrates a modified RC4 algorithm with chaotic map-based encryption. The encryption framework consists of three key stages: diffusion, keystream generation, and confusion. Performance analysis is conducted through encryption and decryption assessments, resistance to statistical and differential attacks (measured via histogram correlation, Number of Pixel Change Rate (NPCR), and Unified Average Changing Intensity (UACI)), entropy calculation, and robustness analysis (Peak Signal-to-Noise Ratio (PSNR) and noise resistance). The proposed algorithm demonstrates enhanced security and computational efficiency, with superior resistance to statistical and brute-force attacks. A comparative analysis with existing encryption methods confirms the robustness of the proposed approach in securing digital images. © (2025), (International Association of Engineers). All rights reserved.
Department of Mathematics, Universitas Negeri Yogyakarta, Indonesia; Department of Information Technology, Institut Teknologi Nasional, Malang, Indonesia
