Recent natural and man-made disasters made urgent to understand the dependency of our society from infrastructures that, if disrupted or destroyed, would seriously compromise quality of life and overall functioning of society. Therefore, Critical Infrastructure (CI) protection has become a general label for a range of activities undertaken jointly by government and operators of key facilities and systems to ensure an adequate risk management, becoming one of most important issues for the EU community. CI systems are characterized by a high degree of interconnection. Therefore, proper data communication between dependent physical, virtual and logical elements within them is paramount. Exploring techniques to make data communication in CI possible, effective, reliable, efficient and resilient is the purpose of this special session.