This book constitutes revised selected papers from the 6th International Workshop on Critical Information Infrastructure Security, CRITIS 2011, held in Lucerne, Switzerland, in September 2011. The 16 full papers and 6 short papers presented in this volume were carefully reviewed and selected from 38 submissions. They deal with all areas of critical infrastructure protection research.

This book constitutes the thoroughly refereed post-proceedings of the 7th International Workshop on Critical Information Infrastructures Security, CRITIS 2012, held in Lillehammer, Norway, in September 2012. The 23 revised full papers were thoroughly reviewed and selected from 67 submissions. The papers are structured in the following topical sections: intrusion management; smart metering and grid, analysis and modeling; SCADA; cyber issues; CI analysis; CIP sectors; CI assessment; and threat modeling.