I am a PhD candidate at the
Institute of Science and Technology Austria (ISTA) in the
Cryptography group supervised by
Krzysztof Pietrzak. During my studies, I also did an internship at
IOG.
I am broadly interested in cryptography and its applications, especially distributed ledgers and privacy-preserving technologies. My past research investigated the use of non-standard physical resources (e.g., disk space or time) in cryptography.
Before joining ISTA, I completed the
Bachelor with Honors program at
TU Wien under the mentorship of
Matteo Maffei. During this time, I also participated in CTFs playing with the team
We_0wn_Y0u.
I am looking for consulting work and other opportunities that align with my interests. Please reach out. My email address is
protected. Enable JavaScript to view it.
Publications
Putting Sybils on a Diet: Securing Distributed Hash Tables using Proofs of Space
Christoph U. Günther and Krzysztof Pietrzak
In submission
Workshop on Cryptographic Tools for Blockchains @ Eurocrypt 2025 (non-archival)
Workshop on Cryptographic Tools for Blockchains @ Eurocrypt 2025 (non-archival)
Space-Deniable Proofs
Jesko Dujmovic, Christoph U. Günther, and Krzysztof Pietrzak
Theory of Cryptography Conference 2025
(to appear)
Constrained Verifiable Random Functions Without Obfuscation and Friends
Nicholas Brandt, Miguel Cueto Noval, Christoph U. Günther, Akin Ünal, and Stella Wohnig
Theory of Cryptography Conference 2025
(to appear)
Nakamoto Consensus from Multiple Resources
Mirza Ahad Baig, Christoph U. Günther, and Krzysztof Pietrzak
Advances in Financial Technologies 2025
Appearences in non-archival venues
The Science of Blockchain Conference 2025Workshop on Cryptographic Tools for Blockchains @ Eurocrypt 2025
Deniability in Automated Contact Tracing: Impossibilities and Possibilities
Christoph U. Günther and Krzysztof Pietrzak
Privacy Enhancing Technologies Symposium 2024
Trapdoor Memory-Hard Functions
Benedikt Auerbach, Christoph U. Günther, and Krzysztof Pietrzak
Eurocrypt 2024
Practical Asynchronous Proactive Secret Sharing and Key Refresh
Christoph U. Günther*, Sourav Das, and Lefteris Kokoris-Kogias
Cryptology ePrint Archive 2022
Authors are usually ordered alphabetically. If not, * denotes the first author. See also
Google Scholar,
DBLP, or
ORCID, which might be more up-to-date.