Dr. Christian Tiefenau

SOUPS 2023 - Full Paper - Distinguished paper award

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

SOUPS 2023 - Full Paper

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

SOUPS 2023 - Full Paper

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

CHI 2023 - Full Paper

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

Maximilian Häring, Eva Gerlitz, Matthew Smith, Christian Tiefenau

SOUPS 2021 - Full Paper

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

SOUPS 2020 - Full Paper

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

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

ACM CCS 2019 - Full Paper

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

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

SOUPS 2019 - Poster Session

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

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

SOUPS 2019 - Poster Session

"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

SOUPS 2019 - Poster Session

A Case Study on (Security) Update Processes in Working Environments: Understanding the Context

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

SOUPS 2018 - Full Paper

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

Alena Naiakshina, Anastasia Danilova, Christian Tiefenau, Matthew Smith

SOUPS 2018 - Poster Session

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

Christian Tiefenau, Emanuel von Zezschwitz

ACM CCS 2017 - Full Paper

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

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

Research Assistant // Jun'15 - now

L3S Hannover and University of Bonn

Working and researching under the supervision of Prof. Dr. Matthew Smith at the University of Bonn.

Senior Software Developer // Oct'14 - Mar'17

GiPsy Software Solutions GmbH

Design and development of a new software product from scratch with the goal to replace the old solution. A new software called "GiPsy XPerience" came to life and is now used in production.

Software Developer Student Job // Oct'08 - Sep'14

GiPsy Beratungsgesellschaft GmbH

Maintainance and development of new features for their software product "GiPsy Provision". A solution for cardealers to manage their company.