Tjerand Silde

Hi! I am an Associate Professor in Cryptology at the Department of Information Security and Communication Technology at the Norwegian University of Science and Technology (NTNU) in Trondheim, where I lead the NTNU Applied Cryptology Lab.

My research focuses on lattice-based cryptography as a foundation for advanced digital signatures and zero-knowledge protocols. More broadly, I am interested in post-quantum cryptography, multiparty computation, homomorphic encryption, and secure implementations.

I lead the post-quantum cryptography work package in the OffPAD project, the Cryptology and Social Life project, and the ToppForsk@IE: Cryptography research group. I also coordinate the Cryptographic Engineering profile in the Cyber Security and Data Communication Master of Science in Engineering program at NTNU.

I am a Security and Cryptography Expert at the cybersecurity company Pone Biometrics, and a member of the International Association for Cryptologic Research (IACR).

News

• The Cryptology and Social Life project has been awarded four four-year PhD positions through NTNU’s internal call “A more resilient society”. The new project will develop secure, privacy-preserving, and democratically aligned digital identity wallets for Norway, with one PhD position in each of the four participating departments from 2027 to 2031.
• Our paper Olingo: Threshold Lattice Signatures with DKG and Identifiable Abort was accepted to ACM CCS 2026. This is joint work with Kamil Doruk Gur, Patrick Hough, Jonathan Katz, and Caroline Sandsbråten.
• Together with more than 800 scientists, I co-authored an open letter in September 2025 on the EU Presidency’s proposal for the Child Sexual Abuse Regulation (“Chat Control”). Follow-up letters were published in November 2025 and in February 2026, the latter raising concerns about new proposals on digital age verification.
• Together with Kristian Gjøsteen (NTNU), Jonathan Komada Eriksen (KU Leuven), Øyvind Ytrehus, and Morten Øygarden (UiB), I published an opinion piece in digi.no on PQC vs. QKD, arguing that post-quantum cryptography is the most promising path forward.
• I co-organized the International Workshop on Foundations and Applications of Privacy-Enhancing Cryptography with Lucjan Hanzlik and Daniel Slamanig, held as an affiliated event of IACR Eurocrypt 2026 in Rome on May 10, 2026.
• We opened the CRYPTO-LAB for theoretical and practical cryptographic research and education. It is currently used in TTM4205 Secure Cryptographic Implementations.
• I joined NTNU as Associate Professor in Cryptology on September 1, 2022.

I support the Electronic Frontier Foundation, the Tor Project, and the Signal Foundation.