About
Hi, my name is Jan Oupický and I am currently a cryptography PhD student at the University of Luxembourg.
I did my masters at Charles University in Prague where I studied mathematics. I did my master thesis on the topic of isogeny-based key exchange algorithms SIDH and CSIDH — in case you are interested in understanding the math behind those algorithms in detail, I recommend you taking a look.
The focus of my research is post-quantum cryptography, which is cryptography resistant to quantum computer attacks. Specifically, I focus on the process of migration to post-quantum cryptography, which is the process of updating/upgrading existing cryptographic systems to post-quantum cryptography.
Work
I co-authored the following publications:
- Arriaga, A., Mestel, D., Oupický, J., Rønne, P. B. and Škrobot, M. "HIC is all you need: Practical Post-Quantum Password-Authenticated Public Key Encryption." CT-RSAC 2026.
- Müller, J. and Oupický, J. "Post-quantum XML and SAML Single Sign-On." Proceedings on Privacy Enhancing Technologies 2024, no. 4 (2024): 525-543.
- Ricci, S., Shapoval, V., Dzurenda, P., Roenne, P., Oupicky, J. and Malina, L. "Lattice-based Multisignature Optimization for RAM Constrained Devices." In Proceedings of the 19th International Conference on Availability, Reliability and Security, pp. 1-10. 2024.
- Alnahawi, N., Müller, J., Oupický, J. and Wiesmaier, A. "A Comprehensive Survey on Post-Quantum TLS." IACR Communications in Cryptology 1, no. 2 (2024). Also accepted to AcrticCrypt 2025 ❤️.