The NTNU Applied Cryptology Lab (NaCl) is a joint research group between the Department of Information Security and Communication Technology and the Department of Mathematical Sciences at NTNU, focusing on designing and analysing secure cryptographic protocols and systems. We cooperate with many prominent research groups, both nationally and internationally, as well as with industry and other partners.

Our research interests are the theory and practice of key exchange, digital signatures, homomorphic encryption, verifiable computation, electronic voting, formal verification, symmetric cipher design and analysis, cryptography engineering, and data privacy. We are particularly interested in designing and analysing schemes secure against quantum adversaries. You can find more details about our research by looking at recent publications by the members of our research group.

We organised the flagship conference IACR Eurocrypt 2022 in Trondheim and area conference IACR Public Key Cryptography 2025 in Røros, and our members regularly serve on program- and organisational committees for top cryptography venues such as ACM CCS, IACR Crypto, IACR Eurocrypt, IACR Asiacrypt and PETS.