This book includes research papers presented at the International Conference on Emerging Trends in Expert Applications and Security (NICE-TEAS 2025) jointly organized by WSG University, Bydgoszcz, Poland, Shree KKarni Universe College, Jaipur, and IES University, Bhopal, India during 4 – 6 July 2025. It includes research work from researchers, academicians, business executives, and industry professionals for solving real-life problems by using the advancements and applications of data science and network engineering. This book covers many advanced topics, such as AI and machine learning for cyber security and threat detection, big data analytics and real-time data processing, IoT networks, cloud security, edge computing and data protection, deep learning and AI-driven predictive analytics, quantum computing for next-gen expert applications, computer vision and image recognition in smart systems, and multimedia applications in forensics, security and intelligence.