**Abstract: **In the first part of the presentation the notion of structural controllability of networks will be introduced. It is explained how to determine the minimum number of nodes that need to be controlled, such that full control of the whole network can be achieved. Next, a range of research questions is formulated, related to the increase in the number of needed control nodes, when the network is being attacked. In the second part of the lecture a use case is presented comprising the computation of an availability metric, for a real-life critical infrastructure. The use case consists of a real-life gas distribution network with 20567 nodes and 20749 edges.

It will be pointed out how the described research directions fit in the scope of current iTrust projects.

**Bio: **Prof. Kooij is a Principal Research Scientist in iTrust. His research currently focuses on both theoretical assessment of robustness and resilience of networks, and on the application of these concepts to cybersecurity and critical infrastructures, such as power grids and water distribution networks. Robert Kooij has a background in mathematics: he received his PhD degree cum laude at Delft University of Technology, in 1993. From 1997 until 2003 he was employed at KPN, the largest telecom operator in the Netherlands. Since 2003 he was employed at TNO, the Netherlands Organization of Applied Scientific Research. In 2011 he became Principal Scientist, conducting and managing research on Critical ICT Infrastructures.

Since 2005 Robert is part-time affiliated with the Delft University of Technology, at the faculty of Electrical Engineering, Mathematics and Computer Science. Since 2010 he is a part-time full professor with the chair “Robustness of Complex Networks”. In 2016 prof. Kooij relocated to the TNO South-East Asia office in Singapore. As of April 2018 he is a principal research scientist at the SUTD, working on cybersecurity for critical infrastructures.