Keynotes On-Body User Interfaces for Security , Keynote @ Workshop on On-Body User Interfaces for Security, Privacy, and Safety, Abu Dhabi, United Arab Emirates, 18. March 2025 [Website] Behavior and Physiology-Aware User Interfaces for Security , Keynote @ ACM Augmented Humans 2023, Glasgow, Scotland, 13. March 2023 [Website] Out-of-the-Lab Usable Security Research , Keynote @ APPS Workshop UMAP 2021, virtual, 25. June 2021 [Website] Ubiquitous Security - Opportunities and Challenges of Usable Security in the Ubiquitous Computing Age , Keynote @ CoSDEO Workshop PerCom 2018, Athens, Greece, 16. March 2018 [Website]