Introduction -- Part I: Infrastructure -- Infrastructures of network computing -- Infrastructures of mobile/ubiquitous systems -- Infrastructures of cloud systems -- Infrastructures of IoT systems -- Part II: Architecture -- Architectures of network computing -- Architectures of mobile/ubiquitous systems -- Architectures of cloud systems -- Architectures of IoT systems -- Part III: Algorithms -- Algorithms of network computing -- Algorithms of mobile/ubiquitous systems -- Algorithms of cloud systems -- Algorithms of IoT systems -- Part IV: Protocols -- Protocols of network computing -- Protocols of mobile/ubiquitous systems -- Protocols of cloud systems -- Protocols of IoT systems -- Conclusion.

This book presents the proceedings of the 6th International Conference on Wireless Intelligent and Distributed Environment for Communication (WIDECOM 2023), which took place at Brock University, St. Catharines, Ontario, Canada, October 11-13, 2023. The book addresses issues related to new dependability paradigms, design, and performance of dependable network computing and mobile systems, as well as issues related to the security of these systems. The goal of the conference is to provide a forum for researchers, students, scientists and engineers working in academia and industry to share their experiences, new ideas and research results in the above-mentioned areas.