This book constitutes the refereed proceedings of the 5th International Conference on Computing Science, Communication and Security, COMS2 2024, held in Mehsana, Gujarat, India, during February 6-7, 2024. The 28 full papers and 03 short papers presented in this volume were carefully reviewed and selected from 290 submissions. They are grouped into the following topics: experiences, ideas, and research results on aspects of Computing Science, Network Communication, and Security.