Critical Information Infrastructures Security

This book constitutes the refereed proceedings of the 16th International Conference on Critical Information Infrastructures Security, CRITIS 2021, which took place in Lausanne, Switzerland, during September 27-29, 2021.The 12 full papers included in this volume were carefully reviewed and selected from 42 submissions. They were organized in topical sections as follows: protection of cyber-physical systems and industrial control systems (ICS); C(I)IP organization, (strategic) management and legal aspects; human factor, security awareness and crisis management for C(I)IP and critical services; and future, TechWatch and forecast for C(I)IP and critical services.