Stephen Dirk Bjørn Wolthusen

Stephen Dirk Bjørn Wolthusen is a Professor in the Department of Information Security and Communication Technology at NTNU (Norwegian University of Science and Technology) located in Gjøvik. His research focuses on cybersecurity, smart grids, critical infrastructure protection, and adversarial attack analysis in cyber-physical systems. He has published extensively in top-tier venues like IEEE Transactions, LNCS, and IFIP series.

Wolthusen's work spans theoretical frameworks (e.g., π-calculus modeling, queueing networks) and applied domains such as SCADA systems, smart grid resilience, and IoT security. He has collaborated on projects involving tactical service-oriented architectures, software-defined networks, and privacy-preserving healthcare systems. His recent research emphasizes adversary-resistant topology design, dynamic policy enforcement, and resilience metrics for critical infrastructure.

Key contributions include frameworks for threat modeling in industrial control systems, formal verification of CPS protocols, and analysis of adversarial attacks on communication protocols like IEC 61850. His work bridges theoretical computer science with practical engineering challenges in cybersecurity and networked systems.