Felix Günther





I am a postdoctoral researcher in the Security and Cryptography group working with Mihir Bellare at UC San Diego, supported by a fellowship of the German Research Foundation (DFG).

Prior to that, I was a postdoc in the Cryptography and Complexity Theory (Cryptoplexity) group led by Marc Fischlin at Technische Universität Darmstadt. I obtained my Ph.D. in Computer Science from TU Darmstadt in February 2018 under the supervision of Marc Fischlin, and, earlier, M.Sc. degrees in Computer Science and IT Security from TU Darmstadt. I am a member of the IACR.

Research Interests

I am interested in applied cryptography enabling computer security, and provable cryptographic security more specifically. My work aims to narrow the gap between the theoretical understanding and practical security of real-world cryptographic systems. To this end, I especially investigate the provable security of (Internet) cryptographic protocols for key exchange and secure channels, for example the prominent Transport Layer Security (TLS) protocol. In doing so, my work broadly encompasses theoretical modeling of security properties and assumptions, provable-security analyses of real-world protocols, as well as guidance on practical protocol design.

Academic Career and Education

since 2018Postdoctoral researcher in the Security and Cryptography group at UC San Diego
2018Postdoctoral researcher in the Cryptoplexity group at TU Darmstadt
2013–2018Ph.D. in Computer Science, TU Darmstadt
2010–2013M.Sc. in Computer Science, TU Darmstadt
2010–2013M.Sc. in IT Security, TU Darmstadt
2007–2010B.Sc. in Computer Science, TU Darmstadt

Awards and Honors

2017,2018Collaboration Award 2017 and 2018 of the collaborative research center CROSSING at TU Darmstadt
2018Best Teaching Award for Lecture Real World Crypto, TU Darmstadt, summer term 2017 (teaching assistant, award for overall lecture)
2015Best student paper award at ACISP 2015
2011Laureate of the CAST Award IT Security (CAST-Förderpreis IT-Sicherheit): 2nd prize in the category "Bachelor and Study Theses" for my bachelor thesis "Cryptographic Treatment of Private User Profiles"
2007–2013Scholarship from the German National Academic Foundation (Studienstiftung des deutschen Volkes)

Professional Activities

May 2019EUROCRYPT 2019 Workshop General Co-Chair
Sep 2018Speaker at the ECRYPT-NET School on Integrating Advanced Cryptography with Applications
Feb–Dec 2011Collaboration in the project "Group Signatures: Privacy-Preserving Authentication Methods", a survey for the German Federal Office for Information Security (BSI), conducted by the Cryptographic Protocols group at TU Darmstadt
The resulting survey can be found at www.bsi.bund.de.

Program Commitee (PC) Member

  • CRYPTO: 2019

Peer Reviewing for Scientific Conferences and Journals

  • 2019: EUROCRYPT
  • 2018: ACM CCS
  • 2017: EUROCRYPT, PKC, ACISP, Latincrypt
  • 2016: CRYPTO
  • 2015: Latincrypt, ACM CCS
  • 2014: INFOCOM, TCC, ACNS, ASIACRYPT, Elsevier Information Processing Letters
  • 2013: Elsevier Computer Communications Journal

Research Visits

Mar 2017 UC San Diego, La Jolla, CA, USA – Security and Cryptography Group
Host: Prof. Mihir Bellare
Feb 2017 Stanford University, Stanford, CA, USA – Applied Cryptography Group
Host: Prof. Dan Boneh
Jan 2017 Cornell Tech University, New York City, NY, USA – Security Group
Host: Prof. Thomas Ristenpart
Jan 2017 Johns Hopkins University, Baltimore, MD, USA – Information Security Institute
Host: Prof. Matthew D. Green
Jan 2017 IBM T.J. Watson Research Center, Yorktown Heights, NY, USA – Cryptography Research Group
Host: Dr. Hugo Krawczyk
Apr 2016 Ruhr-Universität Bochum, Bochum, Germany – Lehrstuhl für Netz- und Datensicherheit
Hosts: Prof. Dr. Jörg Schwenk and Dr. Tibor Jager
Jun–Jul 2015 Queensland University of Technology, Brisbane, Australia – Information Security Discipline
Host: Senior Lecturer Dr. Douglas Stebila
May 2015 Technische Universität Dresden, Dresden, Germany – Lehrstuhl für Datenschutz und Datensicherheit
Host: Prof. Dr. Thorsten Strufe
Jan 2015 Royal Holloway, University of London, Egham, UK – Information Security Group
Host: Prof. Kenneth G. Paterson

Research Impact and Media Attention


Technische Universität Darmstadt

  • winter term 2018/2019: Organization of the graduate-level seminar Reading the Crypto Classics
  • summer term 2018: Teaching assistant for the lecture Real World Crypto by Marc Fischlin
  • summer term 2018: Organization of the graduate-level seminar Reading the Crypto Classics
  • winter term 2017/2018: Organization of the graduate-level seminar Reading the Crypto Classics
  • summer term 2017: Teaching assistant for the lecture Real World Crypto by Marc Fischlin
    (Best Teaching Award for overall lecture)
  • winter term 2016/2017: Teaching assistant for the research seminar Research-Oriented Cryptography by Marc Fischlin
  • winter term 2015/2016: Teaching assistant for the lecture Functional and Object-oriented Programming Concepts (Funktionale und objektorientierte Programmierkonzepte, ex. Grundlagen der Informatik 1) by Marc Fischlin
  • winter term 2013/2014: Teaching assistant for the lecture Introduction to Computer Science 1 (Grundlagen der Informatik 1) by Marc Fischlin
  • winter term 2011/2012: Teaching assistant (tutor) for the lecture Introduction to Cryptography (Einführung in die Kryptographie) by Marc Fischlin

Felix Günther

Dr. rer. nat. Felix Günther

University of California San Diego
CSE Department
Security and Cryptography Group
9500 Gilman Drive
La Jolla, CA 92093-0404

Office:EBU3B, Room 4202


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