This book explores the cybersecurity needed for cyber-physical systems (CPS), with a focus on results of research and real-world deployment experiences. It addresses CPS across multiple sectors of industry. CPS emerged from traditional engineered systems in the areas of power and energy, automotive, healthcare, and aerospace. In general, these systems are mission-critical-their availability and correct operation is essential. This book focuses on the security of such mission-critical systems. The book brings together engineering and IT experts who have been dealing separately with these issues.