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About

Researcher at CWI, Amsterdam, the Netherlands, Crypto group
Professor at Leiden University, the Netherlands, Mathematical Institute

Teaching

• Leiden U., Spring 2024 Lattices and their Algorithms
• MasterMath, Spring 2018 Intro to Lattice Algorithms and Cryptography , Co-taught with Daniel Dadush
• Summer Schools see: All events

Recent/Future Events (All events)

Publications

Scientific activities

• Program Committee Member PKC 2016, AfricaCrypt 2016, PKC 2017, STACS 2017, EUROCRYPT 2017, PKC 2018, SCN 2018, CRYPTO 2018, ASIACRYPT 2018, PKC 2019, LatinCrypt 2019, EUROCRYPT 2020, EUROCRYPT 2021, PQCrypto 2021, PQCrypto 2022, EUROCRYPT 2023, AAC 2024, PKC 2025, EUROCRYPT 2027.
• Editorial Board Member Transactions on Mathematical Cryptology (2020–), Journal of Cryptology (2026–).
• Principal Investigator ERC-STG project ARTICULATE (A Reduction Theory for Codes and Lattices in Cryptography)
• Member H2020 Consortium Prometheus
• Co-Scientific Organizer of the workshop on Mathematical Structures for Cryptography @Lorentz Center, Leiden, with Hendrik Lenstra, Alice Silverberg, Marco Streng.
• Co-Organizer of the FPLLL-days 3 @CWI, Amsterdam, with Martin Albrecht, Marc Stevens.
• Co-Designer of schemes submitted for standardization:
  NewHope — submitted to NIST PQC; reached Round 2, then was not advanced.
  Kyber — submitted to NIST PQC; selected and standardized as ML-KEM (FIPS 203).
  Dilithium — submitted to NIST PQC; selected and standardized as ML-DSA (FIPS 204).
  FrodoKEM — NIST PQC Round 3 alternate, not selected by NIST; standardized by ISO as ISO/IEC 18033-2:2006/Amd 2:2026.
  HAWK — submitted to NIST's Additional Digital Signatures process; reached Round 3 and was withdrawn on 29 July 2026.
• Students and Post-Docs I've had the pleasure to work with
  Paola de Perthuis, currently Post-Doc @CWI.
  Emil Riedeman, BSc project student at Leiden University (2026), co-supervised with Vedran Dunjko.
  Julian Nowakowski , currently Post-Doc @CWI.
  Amédée Le Berre, Master Intern (5 Month) @CWI, from ENS-PSL (Paris).
  Johanna Loyer, former Post-Doc @CWI.
  Lynn Engelberts, former PhD student and currently post-doc @CWI, PhD Thesis.
  Simona Etinski, former Post-Doc @CWI.
  Benjamin Wesolowski, Post-Doc @CWI (2019), co-hosted with Ronald Cramer; currently CNRS Researcher at ENS Lyon.
  Shane Gibbons, Ph.D Student @CWI & Leiden U..
  Ludo Pulles, Ph.D Student @CWI.
  Eamonn Postlethwaite, former Post-Doc @CWI; currently Lecturer in Cryptography at King's College London.
  Wessel P.J. Van Woerden , B.S. Thesis, M.S Thesis, and PhD Thesis from Leiden University; former PhD student and currently cryptography researcher at PQShield.
  Koen de Boer, former PhD student, PhD Thesis.
  Joël Felderhoff, (6 Month) PhD. Intern, from ENS Lyon.
  Alice Pellet–Mary, PhD. Intern from ENS Lyon (2019); currently CNRS Researcher at the University of Bordeaux.
  Oleksandra Lapiha (6 Month), Intern, from ENS Paris, Master level, Internship report.
  Yang Yu, PhD. Intern (3 months), from Tsinghua University and later Post-Doc @CWI; currently Associate Researcher at Tsinghua University.
  Maxime Plançon, Intern (6 Month), from ENS Paris-Saclay, Master level.
  Alex van Poppelen, M.S. Thesis from Utrecht University.
  Willy Quach, Intern (6 months), from ENS Lyon, Master level.
  Guillaume Bonnoron, PhD. Intern (3 months), from IMT Atlantique (formerly Télécom Bretagne).

Peri-scientific activities and press

Press articles.

Cryptris, a video game on (lattice-based) cryptography.

• Game available in French.
• Now also available in English and Dutch as well at cryptris.nl.
• Two popular sciences articles on "Images de Mathematiques", the CNRS's blog:
  http://images.math.cnrs.fr/Cryptris-1-2-Comprendre-une-des.html
  http://images.math.cnrs.fr/Cryptris-2-2-Les-dessous.html