Head of the Security group at the Technical University of Eindhoven. President and co-founder of SecurityMatters, a 3TU spin-off. Prof. at the Services, Cybersecurity, and Safety group of the University of Twente .I am interested in computer security in general and in a few topics in particular, including: network intrusion detection; protection of industrial control systems; access control and trust management; usage control and privacy protection; verification of security protocols.