Christoph Egger

Christoph Egger
Lehrstuhl für angewandte Kryptographie
Fürther Str. 246c / Eingang 5
90429 Nurnberg


9FED 5C6C E206 B70A 5857  70CA 9655 22B9 D49A E731
3C1F 32FB E637 85F2 4461  4AD2 53C2 B1F9 83C5 BAA3

About Me

I am a senior PhD Student in Cryptography. As a master student I worked on Modal Logic and Category Theory and as a Bachelor Student on Anonymous Communication and Software Product Lines. I am also a founding member of the FAUST CTF team and its own competition, FAUST-CTF. Finally I am a Free Software person. I have been a Debian Developer for more than 10 years and have contributed to a variety of software projects including the Linux kernel and the Git version control system.

Research Interests

My current research focus is on cryptographic proofs: Composability (both in the classical Universal Composability interpretation as well as composition and modularization of proofs) and extending security from cryptographic primitives towards their concrete use (for example concerning Ring Signatures and Steganography).

I am also interested in computational notions of entropy, the limits of black box techniques (and related fields like oracle separations) as well as fine-grained and bounded-space cryptography.

In the past I have worked, among other things, on System Software Engineering and Software Product Lines, Coalgebraic Modal Logic and Anonymity Networks.

Free Software

I am a Debian Developer since December 2009, my first contributions go back to 2016. From roughly 2010 to 2016 I have been a core member of the kFreeBSD team supporting this rather unusual combination of BSD and GNU components. Many small contributuions to different Free Software projects are the result of my Debian work. I have initiated the internationalization effort of Unknown Horizons originaly implementing its multi-language support. As a research assistant in the VAMOS research project I contributed more than 50 changes to the Linux Kernel. I also added public key pinning support to the Git version control system.

Internships & Research Visits

Comunity Service


Viktoria Ronge, Christoph Egger, Russell W. F. Lai, Dominique Schröder, and Hoover H. F. Yin. Foundations of ring sampling. IACR Cryptol. ePrint Arch., 2020:1550, 2020. [ bib | http ]

Julian Brost, Christoph Egger, Russell W. F. Lai, Fritz Schmid, Dominique Schröder, and Markus Zoppelt. Threshold password-hardened encryption services. In Jay Ligatti, Xinming Ou, Jonathan Katz, and Giovanni Vigna, editors, CCS '20: 2020 ACM SIGSAC Conference on Computer and Communications Security, Virtual Event, USA, November 9-13, 2020, pages 409--424. ACM, 2020. [ bib | DOI | http ]

Lena Griebel, Marc Hinderer, Ali Amr, Benjamin Meder, Marc Schweig, Dominic Deuber, Christoph Egger, Claudia Kawohl, Annika Krämer, Isabell Flade, Dominique Schröder, and Hans-Ulrich Prokosch. The patient as genomic data manager - evaluation of the PROMISE app. In Louise Bilenberg Pape-Haugaard, Christian Lovis, Inge Cort Madsen, Patrick Weber, Per Hostrup Nielsen, and Philip Scott, editors, Digital Personalized Health and Medicine - Proceedings of MIE 2020, Medical Informatics Europe, Geneva, Switzerland, April 28 - May 1, 2020, volume 270 of Studies in Health Technology and Informatics, pages 1061--1065. IOS Press, 2020. [ bib | DOI ]

Christoph Egger, Pedro Moreno-Sanchez, and Matteo Maffei. Atomic multi-channel updates with constant collateral in bitcoin-compatible payment-channel networks. In Lorenzo Cavallaro, Johannes Kinder, XiaoFeng Wang, and Jonathan Katz, editors, Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security, CCS 2019, London, UK, November 11-15, 2019., pages 801--815. ACM, 2019. [ bib | DOI | http ]

Dominic Deuber, Christoph Egger, Katharina Fech, Giulio Malavolta, Dominique Schröder, Sri Aravinda Krishnan Thyagarajan, Florian Battke, and Claudia Durand. My genome belongs to me: Controlling third party computation on genomic data. Proc. Priv. Enhancing Technol., 2019(1):108--132, 2019. [ bib | DOI ]

Russell W. F. Lai, Christoph Egger, Manuel Reinert, Sherman S. M. Chow, Matteo Maffei, and Dominique Schröder. Simple password-hardened encryption services. In 27th USENIX Security Symposium (USENIX Security 18), pages 1405--1421. USENIX Association, 2018. [ bib | http ]

Russell W. F. Lai, Christoph Egger, Dominique Schröder, and Sherman S. M. Chow. Phoenix: Rebirth of a cryptographic password-hardening service. In 26th USENIX Security Symposium (USENIX Security 17), pages 899--916. USENIX Association, 2017. [ bib | http ]

Daniel Hausmann, Lutz Schröder, and Christoph Egger. Global Caching for the Alternation-free μ-Calculus. In Josée Desharnais and Radha Jagadeesan, editors, 27th International Conference on Concurrency Theory (CONCUR 2016), volume 59 of Leibniz International Proceedings in Informatics (LIPIcs), pages 34:1--34:15. Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik, 2016. [ bib | DOI | .pdf ]

Christoph Egger, Johannes Schlumberger, Christopher Kruegel, and Giovanni Vigna. Research in Attacks, Intrusions, and Defenses: 16th International Symposium, RAID 2013, Rodney Bay, St. Lucia, October 23-25, 2013. Proceedings, chapter Practical Attacks against the I2P Network, pages 432--451. Springer Berlin Heidelberg, 2013. [ bib | DOI | .pdf ]

Reinhard Tartler, Daniel Lohmann, Christian Dietrich, Christoph Egger, and Julio Sincero. Configuration coverage in the analysis of large-scale system software. Operating Systems Review, 45(3):10--14, 2011. [ bib | DOI | .pdf ]

Julio Sincero, Reinhard Tartler, Christoph Egger, Wolfgang Schröder-Preikschat, and Daniel Lohmann. Facing the Linux 8000 Feature Nightmare. In ACM SIGOPS, editor, Proceedings of ACM European Conference on Computer Systems (EuroSys 2010), Best Posters and Demos Session, 2010. [ bib | .pdf ]


Student Theses