Ward Beullens

According to our database, Ward Beullens authored at least 33 papers between 2017 and 2025.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2025

The 2Hash OPRF Framework and Efficient Post-quantum Instantiations.

Ward Beullens, Lucas Dodgson, Sebastian H. Faller, Julia Hesse

Proceedings of the Advances in Cryptology - EUROCRYPT 2025, 2025

Improved Cryptanalysis of SNOVA.

Ward Beullens

Proceedings of the Advances in Cryptology - EUROCRYPT 2025, 2025

Shorter, Tighter, FAESTer: Optimizations and Improved (QROM) Analysis for VOLE-in-the-Head Signatures.

Carsten Baum, Ward Beullens, Lennart Braun, Cyprien Delpech de Saint Guilhem, Michael Klooß, Christian Majenz, Shibam Mukherjee, Emmanuela Orsini, Sebastian Ramacher, Christian Rechberger, Lawrence Roy, Peter Scholl

Proceedings of the Advances in Cryptology - CRYPTO 2025, 2025

2024

A Security Analysis of Restricted Syndrome Decoding Problems.

Ward Beullens, Pierre Briaud, Morten Øygarden

IACR Commun. Cryptol., 2024

Multivariate Blind Signatures Revisited.

Ward Beullens

Proceedings of the Selected Areas in Cryptography - SAC 2024, 2024

One Tree to Rule Them All: Optimizing GGM Trees and OWFs for Post-Quantum Signatures.

Carsten Baum, Ward Beullens, Shibam Mukherjee, Emmanuela Orsini, Sebastian Ramacher, Christian Rechberger, Lawrence Roy, Peter Scholl

Proceedings of the Advances in Cryptology - ASIACRYPT 2024, 2024

2023

Proving knowledge of isogenies - A survey.

Ward Beullens, Luca De Feo, Steven D. Galbraith, Christophe Petit

IACR Cryptol. ePrint Arch., 2023

Oil and Vinegar: Modern Parameters and Implementations.

Ward Beullens, Ming-Shing Chen, Shih-Hao Hung, Matthias J. Kannwischer, Bo-Yuan Peng, Cheng-Jhih Shih, Bo-Yin Yang

IACR Cryptol. ePrint Arch., 2023

Nibbling MAYO: Optimized Implementations for AVX2 and Cortex-M4.

Ward Beullens, Fabio Campos, Sofía Celi, Basil Hess, Matthias J. Kannwischer

IACR Cryptol. ePrint Arch., 2023

LaBRADOR: Compact Proofs for R1CS from Module-SIS.

Ward Beullens, Gregor Seiler

Proceedings of the Advances in Cryptology - CRYPTO 2023, 2023

Graph-Theoretic Algorithms for the Alternating Trilinear Form Equivalence Problem.

Ward Beullens

Proceedings of the Advances in Cryptology - CRYPTO 2023, 2023

Lattice-Based Blind Signatures: Short, Efficient, and Round-Optimal.

Ward Beullens, Vadim Lyubashevsky, Ngoc Khanh Nguyen, Gregor Seiler

Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security, 2023

2022

ECDSA White-Box Implementations: Attacks and Designs from CHES 2021 Challenge.

Guillaume Barbu, Ward Beullens, Emmanuelle Dottax, Christophe Giraud, Agathe Houzelot, Chaoyun Li, Mohammad Mahzoun, Adrián Ranea, Jianrui Xie

IACR Trans. Cryptogr. Hardw. Embed. Syst., 2022

ECDSA White-Box Implementations: Attacks and Designs from WhibOx 2021 Contest.

Guillaume Barbu, Ward Beullens, Emmanuelle Dottax, Christophe Giraud, Agathe Houzelot, Chaoyun Li, Mohammad Mahzoun, Adrián Ranea, Jianrui Xie

IACR Cryptol. ePrint Arch., 2022

Group Signatures and More from Isogenies and Lattices: Generic, Simple, and Efficient.

Ward Beullens, Samuel Dobson, Shuichi Katsumata, Yi-Fu Lai, Federico Pintore

Proceedings of the Advances in Cryptology - EUROCRYPT 2022 - 41st Annual International Conference on the Theory and Applications of Cryptographic Techniques, Trondheim, Norway, May 30, 2022

Breaking Rainbow Takes a Weekend on a Laptop.

Ward Beullens

Proceedings of the Advances in Cryptology - CRYPTO 2022, 2022

2021

MAYO: Practical Post-quantum Signatures from Oil-and-Vinegar Maps.

Ward Beullens

Proceedings of the Selected Areas in Cryptography - 28th International Conference, 2021

CSI-RAShi: Distributed Key Generation for CSIDH.

Ward Beullens, Lucas Disson, Robi Pedersen, Frederik Vercauteren

Proceedings of the Post-Quantum Cryptography - 12th International Workshop, 2021

Improved Cryptanalysis of UOV and Rainbow.

Ward Beullens

Proceedings of the Advances in Cryptology - EUROCRYPT 2021, 2021

2020

Not enough LESS: An improved algorithm for solving Code Equivalence Problems over 픽_q.

Ward Beullens

IACR Cryptol. ePrint Arch., 2020

Not Enough LESS: An Improved Algorithm for Solving Code Equivalence Problems over $\mathbb {F}_q$.

Ward Beullens

Proceedings of the Selected Areas in Cryptography - SAC 2020, 2020

LegRoast: Efficient Post-quantum Signatures from the Legendre PRF.

Ward Beullens, Cyprien Delpech de Saint Guilhem

Proceedings of the Post-Quantum Cryptography - 11th International Conference, 2020

Sigma Protocols for MQ, PKP and SIS, and Fishy Signature Schemes.

Ward Beullens

Proceedings of the Advances in Cryptology - EUROCRYPT 2020, 2020

Calamari and Falafl: Logarithmic (Linkable) Ring Signatures from Isogenies and Lattices.

Ward Beullens, Shuichi Katsumata, Federico Pintore

Proceedings of the Advances in Cryptology - ASIACRYPT 2020, 2020

2019

Cryptanalysis of the Legendre PRF and generalizations.

Ward Beullens, Tim Beyne, Aleksei Udovenko, Giuseppe Vitto

IACR Cryptol. ePrint Arch., 2019

On sigma protocols with helper for MQ and PKP, fishy signature schemes and more.

Ward Beullens

IACR Cryptol. ePrint Arch., 2019

Obfuscating Simple Functionalities from Knowledge Assumptions.

Ward Beullens, Hoeteck Wee

Proceedings of the Public-Key Cryptography - PKC 2019, 2019

PKP-Based Signature Scheme.

Ward Beullens, Jean-Charles Faugère, Eliane Koussa, Gilles Macario-Rat, Jacques Patarin, Ludovic Perret

Proceedings of the Progress in Cryptology - INDOCRYPT 2019, 2019

CSI-FiSh: Efficient Isogeny Based Signatures Through Class Group Computations.

Ward Beullens, Thorsten Kleinjung, Frederik Vercauteren

Proceedings of the Advances in Cryptology - ASIACRYPT 2019, 2019

2018

Public Key Compression for Constrained Linear Signature Schemes.

Ward Beullens, Bart Preneel, Alan Szepieniec

Proceedings of the Selected Areas in Cryptography - SAC 2018, 2018

Practical Attacks Against the Walnut Digital Signature Scheme.

Ward Beullens, Simon R. Blackburn

Proceedings of the Advances in Cryptology - ASIACRYPT 2018, 2018

2017

MQ Signatures for PKI.

Alan Szepieniec, Ward Beullens, Bart Preneel

Proceedings of the Post-Quantum Cryptography - 8th International Workshop, 2017

Field Lifting for Smaller UOV Public Keys.

Ward Beullens, Bart Preneel

Proceedings of the Progress in Cryptology - INDOCRYPT 2017, 2017