Bio
Greg Tystahl is a PhD student in the Department of Computer Science at North Carolina State University. Greg joined the WSPR lab in 2022 and is being co-advised by Drs. William Enck and Alex Kapravelos. He is currently focusing on software supply chain security. Before joining NCSU, Greg received his B.S. in Computer Science and a minor in Mathematics in 2022 from Buena Vista University.
Publications
- Greg Tystahl, Jonah Ghebremichael, Siddharth Muralee, Sourag Cherupattamoolayil, Antonio Bianchi, Aravind Machiry, Alexandros Kapravelos, and William Enck, Cosseter: GitHub Actions Permission Reduction Using Demand-Driven
Static Analysis, in Proceedings of the IEEE Symposium on Security and Privacy (S&P), May 2026.
- Laurie Williams, Giacomo Benedetti, Sivana Hamer, Ranindya Paramitha, Imranur Rahman, Mahzabin Tamanna, Greg Tystahl, Nusrat Zahan, Patrick Morrison, Yasemin Acar, Michel Cukier, Christian Kästner, Alexandros Kapravelos, Dominik Wermke, and William Enck, Research Directions in Software Supply Chain Security, ACM Transactions on Software Engineering Methodology (TOSEM), pp. 1–38, May 2025.
[PDF] - Giacomo Benedetti, Oreofe Solarin, Courtney Miller, Greg Tystahl, William Enck, Christian Kästner, Alexandros Kapravelos, Alessio Merlo, and Luca Verderame, An Empirical Study on Reproducible Packaging in Open-Source Ecosystems, in Proceedings of the IEEE/ACM International Conference on Software Engineering (ICSE), Apr. 2025.
- Greg Tystahl, Yasemin Acar, Michel Cukier, William Enck, Alexandros Kapravelos, Christian Kästner, Dominik Wermke, and Laurie Williams, S3C2 Summit 2024-03: Industry Secure Supply Chain Summit. May-2024. arXiv:2405.08762.
[PDF] - Siddharth Muralee, Igibek Koishybayev, Aleksandr Nahapetyan, Greg Tystahl, Brad Reaves, Antonio Bianchi, William Enck, Alexandros Kapravelos, and Aravind Machiry, ARGUS: A Framework for Staged Static Taint Analysis of GitHub Workflows and Actions, in Proceedings of the USENIX Security Symposium, Aug. 2023.