Jan-Ulrich Holtgrave PhD Student TeamUSEC EIS CISPA Profile Email: jan-ulrich.holtgrave@cispa.de Selected Publications A Qualitative Study of Adoption Barriers and Challenges for Passwordless Authentication in German Public Administrations Jan-Ulrich Holtgrave, Sabrina Klivan, Karola Marky and Sascha Fahl. CHI Conference on Human Factors in Computing Systems (CHI ’25), April 26–May 01, 2025 PDF Abstract Cite URL 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 PDF Abstract Cite
