Last update: November 2025
2025
USENIX Security Symposium — August, 2025 — Seattle, Washington, USA AirTag-Facilitated Stalking Protection: Evaluating Unwanted Tracking Notifications and Tracker Locating Features
Dañiel Gerhardt, Matthias Fassl , Carolyn Guthoff, Adrian Dabrowski, and Katharina Krombholz
2024
USENIX Symposium On Usable Privacy and Security (SOUPS 2024) — August, 2024 — Philadelphia, Pennsylvania, USA POSTER: Will our Colleagues Detect the AirTag? Let's Check (Consensually).
Dañiel Gerhardt, Matthias Fassl , and Katharina Krombholz
USENIX Symposium On Usable Privacy and Security (SOUPS 2024) — August, 2024 — Philadelphia, Pennsylvania, USA POSTER: Investigating Security Folklore: A Case Study on the Tor over VPN Phenomenon
Matthias Fassl , Alexander Ponticello, Adrian Dabrowski, and Katharina Krombholz
Doctoral Dissertation — Saarland University — July, 2024 — Saarbrücken, Germany Averting Security Theater: Methods to Investigate and Integrate Secure Experience in a User-Centered Security Design Process
Matthias Fassl
2023
ACM Conference On Computer-Supported Cooperative Work And Social Computing — October, 2023 — Minneapolis, Minnesota, USA Investigating Security Folklore: A Case Study on the Tor over VPN Phenomenon
Matthias Fassl , Alexander Ponticello, Adrian Dabrowski, and Katharina Krombholz
ACM CHI Conference on Human Factors in Computing Systems — April, 2023 — Hamburg, Germany Different Researchers, Different Results? Analyzing the Influence of Researcher Experience and Data Type During Qualitative Analysis of an Interview and Survey Study on Security Advice
Anna-Marie Ortloff, Matthias Fassl , Alexander Ponticello, Florin Martius, Anne Mertens, Katharina Krombholz, and Matthew Smith
ACM CHI Conference on Human Factors in Computing Systems — April, 2023 — Hamburg, Germany Why I Can't Authenticate – Understanding the Low Adoption of Authentication Ceremonies with Autoethnography
Matthias Fassl and Katharina Krombholz
Book Chapter in “Human Factors in Privacy Research” Empirical research methods in usable privacy and security
Verena Distler, Matthias Fassl , Hana Habib, Katharina Krombholz, Gabriele Lenzini, Carine Lallemand, Vincent Koenig, and Lorrie Faith Cranor
2022
USENIX Symposium on Usable Privacy and Security (SOUPS 2022) — August, 2022 — Boston, Massachusetts, USA Comparing User Perceptions of Anti-Stalkerware Apps with the Technical Reality
Matthias Fassl , Simon Anell, Sabine Houy, Martina Lindorfer, and Katharina Krombholz
USENIX Symposium on Usable Privacy and Security (SOUPS '22) — August, 2022 — Boston, Massachusetts, USA POSTER: Exploring User-Centered Security Design for Usable Authentication Ceremonies
Matthias Fassl , Lea Gröber, and Katharina Krombholz
USENIX Symposium on Usable Privacy and Security (SOUPS '22) — August, 2022 — Boston, Massachusetts, USA POSTER: Investigating Car Drivers’ Information Demand after Safety and Security Critical Incidents
Lea Gröber, Matthias Fassl , Abhilash Gupta, and Katharina Krombholz
2021
ACM Transactions on Computer-Human Interaction (TOCHI) — Volume 28 — Issue 6 A Systematic Literature Review of Empirical Methods and Risk Representation in Usable Privacy and Security Research
Verena Distler, Matthias Fassl , Hana Habib, Katharina Krombholz, Gabriele Lenzini, Carine Lallemand, Vincent Koenig, and Lorrie Faith Cranor
The 4th Workshop on Security, Privacy, Organizations, and Systems Engineering @ ESORICS 2021 International Workshops (ESORICS 2021) — Oct, 2021 Transferring Update Behavior from Smartphones to Smart Consumer Devices
Matthias Fassl , Michaela Neumayr, Oliver Schedler, and Katharina Krombholz
USENIX Symposium on Usable Privacy and Security (SOUPS 2021) — August, 2021 Exploring Authentication for Security-Sensitive Tasks on Smart Home Voice Assistants
Alexander Ponticello, Matthias Fassl , and Katharina Krombholz
alt.chi — Extended Abstracts of the ACM CHI Conference on Human Factors in Computing Systems — May, 2021 — Online Virtual Conference (originally Yokohama, Japan) Stop the Consent Theater
Matthias Fassl , Lea Gröber, and Katharina Krombholz
ACM CHI Conference on Human Factors in Computing Systems — May, 2021 — Online Virtual Conference (originally Yokohama, Japan) Investigating Car Drivers’ Information Demand after Safety and Security Critical Incidents
Lea Gröber, Matthias Fassl , Abhilash Gupta, and Katharina Krombholz
ACM CHI Conference on Human Factors in Computing Systems — May, 2021 — Online Virtual Conference (originally Yokohama, Japan) Exploring User-Centered Security Design for Usable Authentication Ceremonies
Matthias Fassl , Lea Gröber, and Katharina Krombholz
2018
Master Thesis — TU Wien — April, 2018 — Vienna, Austria Usable Authentication Ceremonies in Secure Instant Messaging
Matthias Fassl
Progress — Magazine of the Austrian Students' Association (ÖH) — April, 2018 — Vienna, Austria Wenn der Algorithmus zum Unterdrücker wird (When the Algorithm becomes the Oppressor )
Sabrina Burtscher, Matthias Fassl , and Gabriel Grill