Jan H. Klemmer | TeamUSEC

How Transparent is Usable Privacy and Security Research? A Meta-Study on Current Research Transparency Practices

Jan H. Klemmer, Juliane Schmüser, Fabian Fischer, Jacques Suray, Jan-Ulrich Holtgrave, Simon Lenau, Byron M. Lowens, Florian Schaub and Sascha Fahl. 34th USENIX Security Symposium

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“That’s my perspective from 30 years of doing this”: An Interview Study on Practices, Experiences, and Challenges of Updating Cryptographic Code

Alexander Krause, Harjot Kaur, Jan H. Klemmer, Oliver Wiese and Sascha Fahl. In 34th USENIX Security Symposium, USENIX 2025, Seattle, WA, USA, August 13-15, 2025

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Transparency in Usable Privacy and Security Research: Scholars’ Perspectives, Practices, and Recommendations

Jan H. Klemmer, Juliane Schmüser, Byron M. Lowens, Fabian Fischer, Lea Schmüser, Florian Schaub and Sascha Fahl. In 46th IEEE Symposium on Security and Privacy, IEEE S&P 2025, May 12-15, 2025

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Attributing Open-Source Contributions is Critical but Difficult: A Systematic Analysis of GitHub Practices and Their Impact on Software Supply Chain Security

Jan-Ulrich Holtgrave, Kay Friedrich, Fabian Fischer, Nicolas Huaman, Niklas Busch, Jan H. Klemmer, Marcel Fourné, Oliver Wiese, Dominik Wermke and Sascha Fahl. Network and Distributed System Security (NDSS) Symposium 2025, February 24-28, 2025

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Using AI Assistants in Software Development: A Qualitative Study on Security Practices and Concerns

Jan H. Klemmer, Stefan Albert Horstmann, Nikhil Patnaik, Cordelia Ludden, Cordell Burton Jr, Carson Powers, Fabio Massacci, Akond Rahman, Daniel Votipka, Heather Richter Lipford, Awais Rashid, Alena Naiakshina and Sascha Fahl. In 2024 ACM SIGSAC Conference on Computer and Communications Security (CCS '24), October 14--18, 2024, Salt Lake City, UT, USA

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“You have to read 50 different RFCs that contradict each other”: An Interview Study on the Experiences of Implementing Cryptographic Standards

Nicolas Huaman, Jacques Suray, Jan H. Klemmer, Marcel Fourné, Sabrina Amft, Ivana Trummová, Yasemin Acar and Sascha Fahl. In 33rd USENIX Security Symposium, USENIX Security '24, Philadelphia, PA, USA, August 14-16, 2024

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“Make Them Change it Every Week!”: A Qualitative Exploration of Online Developer Advice on Usable and Secure Authentication

Jan H. Klemmer, Marco Gutfleisch, Christian Stransky, Yasemin Acar, M. Angela Sasse and Sascha Fahl. In 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS '23), November 26–30, 2023, Copenhagen, Denmark

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Pushed by Accident: A Mixed-Methods Study on Strategies of Handling Secret Information in Source Code Repositories

Alexander Krause, Jan H. Klemmer, Nicolas Huaman, Dominik Wermke, Yasemin Acar and Sascha Fahl. In 32nd USENIX Security Symposium, USENIX 2023, Anaheim CA, USA, August 9-11, 2023

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Poster: Pushed by Accident – Prevention and Remediation Strategies Against Secret Leakage

Alexander Krause, Jan H. Klemmer, Nicolas Huaman, Dominik Wermke, Yasemin Acar and Sascha Fahl. In 19th Symposium on Usable Privacy and Security, SOUPS 2023, Anaheim CA, USA, August 6-8, 2023

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"Always Contribute Back": A Qualitative Study on Security Challenges of the Open Source Supply Chain

Dominik Wermke, Jan H. Klemmer, Noah Wöhler, Juliane Schmüser, Harshini Sri Ramulu, Yasemin Acar and Sascha Fahl. In 44th IEEE Symposium on Security and Privacy, IEEE S&P 2023, May 22-25, 2023

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If You Can’t Get Them to the Lab: Evaluating a Virtual Study Environment with Security Information Workers

Nicolas Huaman, Alexander Krause, Dominik Wermke, Jan H. Klemmer, Christian Stransky, Yasemin Acar and Sascha Fahl. Eighteenth Symposium on Usable Privacy and Security, SOUPS 2022, Boston MA, USA, August 8-9, 2022

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Poster: Committed by Accident – Prevention and Remediation Strategies Against Secret Leakage

Alexander Krause, Jan H. Klemmer, Nicolas Huaman, Dominik Wermke, Yasemin Acar and Sascha Fahl. In 43rd IEEE Symposium on Security and Privacy, IEEE S&P 2022, May 23-26, 2022

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How Does Usable Security (Not) End Up in Software Products? Results From a Qualitative Interview Study

Marco Gutfleisch, Jan H. Klemmer, Niklas Busch, Yasemin Acar, M. Angela Sasse and Sascha Fahl. 43rd IEEE Symposium on Security and Privacy, IEEE S&P 2022, May 22-26, 2022

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Committed to Trust: A Qualitative Study on Security & Trust in Open Source Software Projects

Dominik Wermke, Noah Wöhler, Jan H. Klemmer, Marcel Fourné, Yasemin Acar and Sascha Fahl. 43rd IEEE Symposium on Security and Privacy, IEEE S&P 2022, May 22-26, 2022

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Selected Publications