Henri Ruotsalainen

Henri Ruotsalainen is a Researcher at the University of Applied Sciences St. Pölten (FH St. Pölten), affiliated with the Institute of IT Security Research and the Department of Computer Science and Security. His work focuses on IoT security, wireless network protection, and sensor system resilience, with particular emphasis on LoRaWAN and critical infrastructure security.

• PhD in Technical Sciences (Dr. Techn.) from Vienna University of Technology (2011–2015)
• Diploma in Engineering (Dipl.-Ing.) from Helsinki University of Technology (2002–2010)
• Prior roles as University Assistant (Helsinki, 2007–2008) and Project Assistant (Vienna, 2011–2015)

Ruotsalainen's research explores physical layer security for IoT, including radio-based key generation, supply voltage watermarking, and reactive jamming detection. His projects like LoRaKey and Substation Security aim to strengthen wireless communication integrity in industrial environments. Recent publications highlight trends in sensor network security and smart home vulnerabilities, with a focus on metadata differencing and attack countermeasures.

Scientific contributions include:

• 15+ peer-reviewed articles in journals like Sensors and IEEE Transactions
• Participation in conferences including IEEE ETFA, ARES, and IT-SECX
• Development of security testbeds for LoRaWAN and critical infrastructure systems