I am an assistant professor at the Delft University of Technology. Previously, I was an assistant professor at Maastricht University and, before that, a postdoctoral researcher at the Technical University of Munich. I received my PhD degree in IT Security from the Ruhr-University Bochum. I also hold a M.Sc. and B.Sc. in Computer Science from the University of Crete. My research interests include systems, network, and web security. My work focuses on developing new security paradigms, architectures, and software for secure and trustworthy ICT and IoT systems, as well as investigating malicious activities such as the ones that take place on the dark web and its underground markets.