Christoph Günther
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 .
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)
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 venuesThe Science of Blockchain Conference 2025
Workshop 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.