Christian Tiefenau

According to our database, Christian Tiefenau authored at least 19 papers between 2017 and 2025.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2025

I Have Not Understood but Agree: Studying Informed Consent in the Context of the German COVID-19 Contact Tracing App.

Maximilian Häring, Eva Tiefenau, Christian Tiefenau, Felix Kretschmer-Pietralla, Alina Stöver, Nina Gerber

ACM Trans. Comput. Hum. Interact., June, 2025

"You go now! No trouble!" Understanding the Offboarding Process in Companies from an IT Security Perspective.

Christina Detsika, Timo Jagusch, Nora Weidner, Larissa Weir, Florin Martius, Christian Tiefenau

Proceedings of the Twenty-First Symposium on Usable Privacy and Security, 2025

"They are responsible for ensuring that I can continue to use the service." Investigating Users' Expectations Towards 2FA Recovery in Germany.

Eva Tiefenau, Julia Angelika Grohs, Maximilian Häring, Matthew Smith, Christian Tiefenau

Proceedings of the 2025 CHI Conference on Human Factors in Computing Systems, 2025

Out of Sight, Out of Mind? Exploring Data Protection Practices for Personal Data in Usable Security & Privacy Studies.

Florin Martius, Luisa Jansen, Lukas Struck, Arthi Arumugam, Lisa Geierhaas, Anna-Marie Ortloff, Matthew Smith, Christian Tiefenau

Proceedings of the 2025 CHI Conference on Human Factors in Computing Systems, 2025

2024

Can Johnny be a whistleblower? A qualitative user study of a social authentication Signal extension in an adversarial scenario.

Maximilian Häring, Julia Angelika Grohs, Eva Tiefenau, Matthew Smith, Christian Tiefenau

Proceedings of the Twentieth Symposium on Usable Privacy and Security, 2024

2023

SoK: I Have the (Developer) Power! Sample Size Estimation for Fisher's Exact, Chi-Squared, McNemar's, Wilcoxon Rank-Sum, Wilcoxon Signed-Rank and t-tests in Developer-Centered Usable Security.

Anna-Marie Ortloff, Christian Tiefenau, Matthew Smith

Proceedings of the Nineteenth Symposium on Usable Privacy and Security, 2023

Adventures in Recovery Land: Testing the Account Recovery of Popular Websites When the Second Factor is Lost.

Eva Gerlitz, Maximilian Häring, Charlotte Theresa Mädler, Matthew Smith, Christian Tiefenau

Proceedings of the Nineteenth Symposium on Usable Privacy and Security, 2023

Evolution of Password Expiry in Companies: Measuring the Adoption of Recommendations by the German Federal Office for Information Security.

Eva Gerlitz, Maximilian Häring, Matthew Smith, Christian Tiefenau

Proceedings of the Nineteenth Symposium on Usable Privacy and Security, 2023

Less About Privacy: Revisiting a Survey about the German COVID-19 Contact Tracing App.

Maximilian Häring, Eva Gerlitz, Matthew Smith, Christian Tiefenau

Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems, 2023

2021

Behavioral Studies with IT-Administrators - Updating in Complex Environments and Securing Web Servers.

Christian Tiefenau

PhD thesis, 2021

Never ever or no matter what: Investigating Adoption Intentions and Misconceptions about the Corona-Warn-App in Germany.

Maximilian Häring, Eva Gerlitz, Christian Tiefenau, Matthew Smith, Dominik Wermke, Sascha Fahl, Yasemin Acar

Proceedings of the Seventeenth Symposium on Usable Privacy and Security, 2021

Replicating a Study of Ransomware in Germany.

Anna-Marie Ortloff, Maike Vossen, Christian Tiefenau

Proceedings of the EuroUSEC '21: European Symposium on Usable Security 2021, Karlsruhe, Germany, October 11, 2021

2020

Security, Availability, and Multiple Information Sources: Exploring Update Behavior of System Administrators.

Christian Tiefenau, Maximilian Häring, Katharina Krombholz, Emanuel von Zezschwitz

Proceedings of the Sixteenth Symposium on Usable Privacy and Security, 2020

2019

Making Privacy Graspable: Can we Nudge Users to use Privacy Enhancing Techniques?

Christian Tiefenau, Maximilian Häring, Eva Gerlitz, Emanuel von Zezschwitz

CoRR, 2019

"Please enter your PIN" - On the Risk of Bypass Attacks on Biometric Authentication on Mobile Devices.

Christian Tiefenau, Maximilian Häring, Mohamed Khamis, Emanuel von Zezschwitz

CoRR, 2019

A Usability Evaluation of Let's Encrypt and Certbot: Usable Security Done Right.

Christian Tiefenau, Emanuel von Zezschwitz, Maximilian Häring, Katharina Krombholz, Matthew Smith

Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security, 2019

2018

The Struggle is Real: Analyzing Ground Truth Data of TLS (Mis-)Configurations.

Christian Tiefenau, Emanuel von Zezschwitz

CoRR, 2018

Deception Task Design in Developer Password Studies: Exploring a Student Sample.

Alena Naiakshina, Anastasia Danilova, Christian Tiefenau, Matthew Smith

Proceedings of the Fourteenth Symposium on Usable Privacy and Security, 2018

2017

Why Do Developers Get Password Storage Wrong?: A Qualitative Usability Study.

Alena Naiakshina, Anastasia Danilova, Christian Tiefenau, Marco Herzog, Sergej Dechand, Matthew Smith

Proceedings of the 2017 ACM SIGSAC Conference on Computer and Communications Security, 2017