NETCRYPT 2026, the 4th International Conference on Networks and Cryptology, is centered on the theme “Smart Computing and Intelligent Security.” Organized by the School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi, India, the conference was conducted in hybrid mode from October 8–10, 2026. The conference focuses on key research areas, including cryptology, network security, privacy, cybersecurity, and machine learning. It brings together researchers, engineers, academicians, and industry professionals from around the world to present and discuss cutting-edge research, emerging technologies, and recent advancements in communications and network engineering. NETCRYPT 2026 also provides a platform for exploring emerging challenges in wired and wireless networks, including Quality of Service (QoS), authentication, reliability, trust management, security, and robustness. Through technical discussions and knowledge exchange, the conference fosters interdisciplinary collaboration and encourages future research partnerships in smart computing, intelligent security, and network technologies.