This book features selected research papers presented at the 2nd International Conference on Cyber Intelligence and Information Retrieval (CIIR 2023) held at the Institute of Engineering & Management, Kolkata, India, in association with CSI Kolkata section on 14-15 December 2023. Cyber intelligence and information retrieval are closely related fields that deal with the collection, analysis, and utilization of data and information from various digital sources. These fields are crucial in today's digital age, where vast amounts of data are generated and stored electronically. By combining the strengths of cyber intelligence and information retrieval, organizations can enhance their ability to detect, respond to, and mitigate cyber threats, while also improving their overall cybersecurity posture and decision-making processes. This book comprises high-quality research work by academicians and industrial experts in the field of artificial intelligence, data analytics, computing, and communication, including full-length papers, research-in-progress papers, and case studies related to all the areas of data analytics, machine learning, Internet of Things (IoT), information security, etc.