christian janson
I am a Postdoc in the Cryptoplexity team led by Marc Fischlin at Technische Universität Darmstadt. 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-Bacon number is 6.
research interests
My main (current) research interests are:
key exchange
authenticated encryption
secure channels
signature schemes
NEWS
19.09.2020: Our paper Towards Post-Quantum Security for Signal's X3DH Handshake (joint work with Jacqueline Brendel, Marc Fischlin, Felix Günther and Douglas Stebila) has been accepted to SAC 2020
16.08.2020: Our paper Security Reductions for White-Box Key-Storage in Mobile Payments (joint work with Estuardo Alpirez Bock, Chris Brzuska, Marc Fischlin and Wil Michiels) has been accepted to ASIACRYPT 2020
23.06.2020: Our paper Client-oblivious OPRAM (joint work with Gareth T. Davies and Daniel P. Martin) has been accepted to ICICS 2020
15.06.2020: Our paper Robust Channels: Handling Unreliable Networks in the Record Layers of QUIC and DTLS 1.3 (joint work with Marc Fischlin and Felix Günther) is now available on ePrint. Our results informed the IETF QUIC and TLS working groups, contributing forgery limits to the upcoming standards for QUIC and DTLS 1.3.
academic career and education
since July 2016: 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
2020: PKC, Crypto
2019: PKC, Crypto, Asiacrypt, IMA CC
2018: Financial Cryptography, PKC, CT-RSA, Crypto, CCS, iPAT, Asiacrypt
2017: ISSAC, AEIT, ISC
2016: CT-RSA
2015: ESORICS, ACNS, CT-RSA
2014: SAC
Journals
2017: Journal of Designs, Codes and Cryptography
2016: Journal of Designs, Codes and Cryptography, IEEE Transactions on Information Forensics and Security
awards
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 GüntherSeptember 2017: NTNU Trondheim, Trondheim, NO - Dep. of Information Security and Communication Technology
Host: Prof. Colin Boyd & Dr. Gareth T. DaviesAugust 2015: Universität Mannheim, Mannheim, GER - Dependable Systems Engineering
Host: Prof. Dr. Frederik ArmknechtMai 2015: Universität Mannheim, Mannheim, GER - Dependable Systems Engineering
Host: Prof. Dr. Frederik ArmknechtSupervision
Master
Rune Fiedler (November 2019-May 2020) - Stronger Security Notions for Post-Quantum Signature Schemes (co-supervised with Marc Fischlin)
Oliver Käfer (ongoing) - Formale Verifikation von Bluetooth (co-supervised with Marc Fischlin)
Bachelor
Timo Klonowski (May-July 2019) - Sicherheit des USB-Typ-C Authentifizierungsprotokolls (co-supervised with Marc Fischlin)
Jean-Pierre Münch (April-July 2019) - Analysis of the Current State of Non Memory-hard Password-based Cryptographic Primitives (co-supervised with Marc Fischlin)