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My name is Tjerand. I’m a second year PhD student in cryptography at the Department of Mathematical Sciences at the Norwegian University of Science and Technology (NTNU) in Trondheim. My supervisors are Professor Kristian Gjøsteen and Professor Colin Boyd. I am
also working as a cryptography consultant at Offpad AS.

My main foci of research are lattice-based cryptography and zero-knowledge protocols. My interests also span the areas of secure multiparty computation, password-authenticated key exchange, electronic voting and anonymous credentials.

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’ve 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.