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My name is Tjerand. I am a third year PhD student in cryptography at the Department of Mathematical Sciences at the Norwegian University of Science and Technology (NTNU) in Trondheim, where I am a member of the NTNU Applied Cryptology Lab. My supervisor is Professor Kristian Gjøsteen. I am also working as a cryptography advisor at Pone Biometrics.
I am currently visiting Professor Jonathan Katz at the University of Maryland, USA.
My main foci of research are lattice-based cryptography and zero-knowledge protocols. My interests also span the areas of secure multiparty computation, homomorphic encryption, password-authenticated key exchange, electronic voting and anonymous communication.
I graduated from NTNU with a B.Sc. in Mathematics in 2017 and a M.Sc. in Mathematics in 2020, respectively. I spent the academic year 2017-2018 at UC Berkeley, California, USA, and
I spent the fall of 2020 visiting the Aarhus Crypto Group at Aarhus University, Denmark.
I have previously been working as a project manager at Lær Kidsa Koding (2015-17), as a university college teacher at Western Norway University of Applied Sciences (2017-20), and I had a 3 months internship in 2018 at the IoT-security company Intrinsic-ID in Eindhoven, NL.
News:
- Our project “OffPAD – Optimizing balance between high security and usability” got funded 16M NOK by the Norwegian Research Council for research on lightweight and PQ crypto.
- Manuscript: Verifiable Decryption in the Head, is available on IACR ePrint. Joint work with Kristian Gjøsteen, Thomas Haines, Johannes Müller and Peter Rønne.
- Henrik Walker Moe, Martin Strand and myself won the “Built-in-privacy” award from the Norwegian Data Protection Authority for our work on improved privacy in contact tracing.
- Paper: Lattice-Based Proof of Shuffle and Applications to Electronic Voting, is accepted at CT-RSA. Joint work w/ Diego F. Aranha, Carsten Baum, Kristian Gjøsteen and Thor Tunge.
- Manuscript: Anonymous Tokens with Public Metadata and Applications to Private Contact Tracing, is available on IACR ePrint. Joint work with Martin Strand.
I support the Electronic Frontier Foundation and the Signal Foundation.