Research

Publications

• Distributed Key Generation for NTRU
  CANS 2026. Joint work with Patrick Hough, Jérôme Nguyen, and Caroline Sandsbråten.
• Olingo: Threshold Lattice Signatures with DKG and Identifiable Abort
  ACM CCS 2026. Joint work with Kamil Doruk Gur, Patrick Hough, Jonathan Katz, and Caroline Sandsbråten.
• SoK: Recommendations for universally verifiable electronic elections and independent audits
  E-Vote-ID 2026. Joint work with Audhild Høgåsen, Chiara Spadafora, and Amund Fredrik Strømsnes.
• More Efficient Lattice-Based Verifiable Decryption from LWR
  WAHC @ ACM CCS 2025. Joint work with Thomas Haines, Emil August Hovd Olaisen, and Peter Rønne.
• More Efficient Lattice-Based Electronic Voting from NTRU
  IACR Communications in Cryptology, Volume 1, 2024. Joint work with Patrick Hough and Caroline Sandsbråten.
• Two-Round Threshold Lattice-Based Signatures from Threshold Homomorphic Encryption
  PQCrypto 2024. Joint work with Kamil Doruk Gur and Jonathan Katz.
• BRAKE: Biometric Resilient Authenticated Key Exchange
  IEEE Access, Volume 12, 2024. Joint work with Pia Bauspieß, Matej Poljuha, Alexandre Tullot, and Anamaria Costache.
• Verifiable Mix-Nets and Distributed Decryption for Voting from Lattice-Based Assumptions
  ACM CCS 2023. Joint work with Diego F. Aranha, Carsten Baum, and Kristian Gjøsteen.
• Verifiable Decryption in the Head
  ACISP 2022. Joint work with Kristian Gjøsteen, Thomas Haines, Johannes Müller, and Peter Rønne.
• Short paper: Return Codes from Lattice Assumptions
  E-Vote-ID 2022. Joint work with Audhild Høgåsen.
• Short paper: Verifiable Decryption for BGV
  Voting Workshop @ Financial Cryptography 2022.
• Anonymous Tokens with Public Metadata and Applications to Private Contact Tracing
  Financial Cryptography 2022. Joint work with Martin Strand.
• Lattice-Based Proof of Shuffle and Applications to Electronic Voting
  CT-RSA 2021. Joint work with Diego F. Aranha, Carsten Baum, Kristian Gjøsteen, and Thor Tunge.
• Short paper: Where is the Web Still Insecure? Regional Scans for HTTPS Certificates
  NISK 2018. Joint work with Anushua Hossain and Kristina Nelson.

Manuscripts

• BRaccoon: Concurrently Secure Blind Lattice Signatures from Raccoon
  Joint work with Lucjan Hanzlik, Mark Manulis, Marzio Mula, Alan Pulval-Dady, and Daniel Slamanig.
• Threshold Lattice-Based Zero-Knowledge Proofs
  Joint work with Scott Griffy, Victor Youdom Kemmoe, and Ngoc Khanh Nguyen.

Projects

I am Co-Principal Investigator of the project “OffPAD – Optimizing balance between high security and usability” funded with NOK 16 million by the Research Council of Norway, for research on lightweight and post-quantum secure cryptography. This is a joint project with Danilo Gligoroski at NTNU and the cybersecurity company Pone Biometrics.

I received NOK 765,000 from the scientific equipment fund of the IE Faculty to build a cryptology lab for theoretical and practical cryptographic research and education. The CRYPTO-LAB is located at Electro A175.

I lead ToppForsk@IE: Cryptography, focusing on quantum-safe and privacy-preserving cryptography, funded with NOK 200,000 by the NTNU IE Faculty. This is a collaboration with Kristian Gjøsteen and Jeongeun Park.

I lead the “Cryptology and Social Life” project. This is a collaboration with Katrien De Moor, Emil André Røyrvik, Petter Grytten Almklov, Kristian Gjøsteen and Eric Monteiro. In September 2026, we were awarded four four-year PhD positions (about NOK 15 million, 2027–2031) through NTNU’s internal call “A more resilient society”, to develop secure, privacy-preserving, and democratically aligned digital identity wallets for Norway, with one PhD position in each of the four participating departments.

Theses, Reports, and Software

• Privacy-Preserving Cryptography from Zero-Knowledge Proofs
  PhD thesis, 2022.
• Anonymous Tokens
  Open-source library, 2020. Winner of the Privacy by Design Award from the Norwegian Data Protection Authority. Joint work with Henrik Walker Moe and Martin Strand (docs, slides).
• Verifiable Random Secrets and Subliminal-Free Digital Signatures
  Master’s thesis, 2020.
• Challenges in E2E Encrypted Group Messaging
  Technical report, 2020.
• Comparative Study of ECC Libraries for Embedded Devices
  Technical report, 2019.
• Bilinear Pairings of Elliptic Curves
  Bachelor’s thesis, 2015.