This book constitutes the thoroughly refereed post-proceedings of the 8th International Workshop on Critical Information Infrastructures Security, CRITIS 2013, held in Amsterdam, The Netherlands, in September 2013. The 16 revised full papers and 4 short papers were thoroughly reviewed and selected from 57 submissions. The papers are structured in the following topical sections: new challenges, natural disasters, smart grids, threats and risk, and SCADA/ICS and sensors.

This book constitutes revised selected papers from the 13th International Conference on Critical Information Infrastructures Security, CRITIS 2018, held in Kaunas, Lithuania, in September 2018.The 16 full papers and 3 short papers presented were carefully reviewed and selected from 61 submissions. They are grouped in the following topical sections: advanced analysis of critical energy systems, strengthening urban resilience, securing internet of things and industrial control systems, need and tool sets for industrial control system security, and advancements in governance and resilience of critical infrastructures.