christian janson

Bild: Katrin Binner

I am an Athene Young Investigator in Cryptography and Information Security affiliated to the Cryptoplexity team led by Marc Fischlin at Technische Universität Darmstadt in which I have been a Postdoc before as well.
Prior to this I was a Ph.D. student in the Information Security Group at Royal Holloway, University of London under the supervision of Carlos Cid. It all began at Universität Bremen where I studied mathematics and completed my diploma in the AlZAGK group under the supervision of Michael Hortmann.

I am a member of the IACR and my Erdös number is 3.

research interests

My main (current) research interests are:

  • verifiable outsourced computations

  • key exchange

  • secure channels

  • authenticated encryption

  • signature schemes

  • leakage-resilient cryptography


01.09.2021: Our paper BlindOR: An Efficient Lattice-based Blind Signature Scheme from OR-Proofs (joint work with Nabil Alkeilani Alkadri and Patrick Harasser) has been accepted to CANS 2021. The paper will be available soon.

20.08.2021: I will serve as a Programm Co-Chair with Thalia Laing at SSR 2022. Stay tuned for more information.

09.06.2021: Our paper Post-quantum asynchronous deniable key exchange and the Signal handshake (joint work with Jacqueline Brendel, Rune Fiedler, Felix Günther, and Douglas Stebila) is available on ePrint.

30.04.2021: An article about myself and my resreach as an Athene Young Investigator has appeared.

08.03.2021: I have been awarded to be an Athene Young Investigator starting 01.04.2021.

20.02.2021: Our paper BUFFing signature schmes beyond unforgeability and the case of post-quantum signatures (joint work with Cas Cremers, Samed Düzlü, Rune Fiedler and Marc Fischlin) hash been accepted to IEEE S&P 2021.

academic career and education

since April 2021: Athene Young Investigator in the Cryptoplexity team, Technische Universität Darmstadt

2017-2021: Postdoctoral researcher in the Cryptoplexity team, Technische Universität Darmstadt

2012-2016: Ph.D. in Information Security, Royal Holloway, University of London

2006-2012: Diploma in mathematics, Universität Bremen

professional activities

May 2019: Eurocrypt 2019 Workshop General Co-Chair

since March 2017: member of examining board (Prüfungskommission) in the computer science department

peer reviewing

Scientific Conferences

2021: Eurocrypt, Crypto, iPAT

2020: PKC, Crypto, iPAT

2019: PKC, Crypto, Asiacrypt, IMA CC, iPAT

2018: Financial Cryptography, PKC, CT-RSA, Crypto, CCS, iPAT, Asiacrypt


2016: CT-RSA


2014: SAC


2017: Journal of Designs, Codes and Cryptography

2016: Journal of Designs, Codes and Cryptography, IEEE Transactions on Information Forensics and Security

programm committee

2021: iPAT, SAC

2020: iPAT

2019: IMA CC, iPAT

2018: iPAT


2018: Best Teaching Award for Lecture Real World Crypto, TU Darmstadt, summer term 2017 (teaching assistant)

research visits

January 2019: UCSD, San Diego, USA - Dep. of Computer Science and Engineering

Host: Dr. Felix Günther

September 2017: NTNU Trondheim, Trondheim, NO - Dep. of Information Security and Communication Technology

Host: Prof. Colin Boyd & Dr. Gareth T. Davies

August 2015: Universität Mannheim, Mannheim, GER - Dependable Systems Engineering

Host: Prof. Dr. Frederik Armknecht

Mai 2015: Universität Mannheim, Mannheim, GER - Dependable Systems Engineering

Host: Prof. Dr. Frederik Armknecht


In case you wish to write a Bachelor/Master thesis with me then please contact me via email.


R. F. (Nov 2019 - May 2020) - Stronger Security Notions for Post-Quantum Signature Schemes

O. K. (Dec 2019 - Dec 2020) - Formale Verifikation von Bluetooth


T. D. (Sep 2021 - ongoing) - How to designate a verifier in designated-verifier siganture schemes

S. A. (Dec 2020 - May 2021) - Modifikation eines Schlüsselaustauschprotokolls und CrySL-Rules für CogniCrypt

R. K. (Nov 2020 - Mar 2021) - Analyse der Authentifizierungsmethode der VDV Kernapplikation

F.B. (May - Sep 2020) - Security of the FIDO2 Standard

T. K. (May - July 2019) - Sicherheit des USB-Typ-C Authentifizierungsprotokolls

J.-P. M. (Apr - Jul 2019) - Analysis of the Current State of Non Memory-hard Password-based Cryptographic Primitives