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ORCIDWard Beullens
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- affiliation: IBM Research Europe, Zürich, Switzerland
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Journal Articles
- 2024
[j7]Ward Beullens
, Pierre Briaud, Morten Øygarden:
A Security Analysis of Restricted Syndrome Decoding Problems. IACR Commun. Cryptol. 1(3): 33 (2024)- [j6]Ward Beullens, Fabio Campos, Sofía Celi, Basil Hess, Matthias J. Kannwischer:
Nibbling MAYO: Optimized Implementations for AVX2 and Cortex-M4. IACR Trans. Cryptogr. Hardw. Embed. Syst. 2024(2): 252-275 (2024) - 2023
- [j5]Ward Beullens, Samuel Dobson, Shuichi Katsumata, Yi-Fu Lai, Federico Pintore:
Group signatures and more from isogenies and lattices: generic, simple, and efficient. Des. Codes Cryptogr. 91(6): 2141-2200 (2023) - [j4]Ward Beullens, Luca De Feo, Steven D. Galbraith, Christophe Petit:
Proving knowledge of isogenies: a survey. Des. Codes Cryptogr. 91(11): 3425-3456 (2023) - [j3]Ward Beullens, Ming-Shing Chen, Shih-Hao Hung, Matthias J. Kannwischer, Bo-Yuan Peng, Cheng-Jhih Shih, Bo-Yin Yang:
Oil and Vinegar: Modern Parameters and Implementations. IACR Trans. Cryptogr. Hardw. Embed. Syst. 2023(3): 321-365 (2023) - 2022
- [j2]Guillaume Barbu, Ward Beullens, Emmanuelle Dottax, Christophe Giraud, Agathe Houzelot, Chaoyun Li, Mohammad Mahzoun, Adrián Ranea, Jianrui Xie:
ECDSA White-Box Implementations: Attacks and Designs from CHES 2021 Challenge. IACR Trans. Cryptogr. Hardw. Embed. Syst. 2022(4): 527-552 (2022) - 2020
- [j1]Ward Beullens, Tim Beyne, Aleksei Udovenko, Giuseppe Vitto:
Cryptanalysis of the Legendre PRF and Generalizations. IACR Trans. Symmetric Cryptol. 2020(1): 313-330 (2020)
Conference and Workshop Papers
- 2025
- [c23]Ward Beullens:
Improved Cryptanalysis of SNOVA. EUROCRYPT (6) 2025: 277-293 - [c22]Ward Beullens, Lucas Dodgson, Sebastian H. Faller, Julia Hesse:
The 2Hash OPRF Framework and Efficient Post-quantum Instantiations. EUROCRYPT (8) 2025: 332-362 - 2024
- [c21]Carsten Baum, Ward Beullens, Shibam Mukherjee, Emmanuela Orsini, Sebastian Ramacher, Christian Rechberger, Lawrence Roy, Peter Scholl:
One Tree to Rule Them All: Optimizing GGM Trees and OWFs for Post-Quantum Signatures. ASIACRYPT (1) 2024: 463-493 - [c20]Ward Beullens:
Multivariate Blind Signatures Revisited. SAC (1) 2024: 230-236 - 2023
- [c19]Ward Beullens, Vadim Lyubashevsky, Ngoc Khanh Nguyen, Gregor Seiler:
Lattice-Based Blind Signatures: Short, Efficient, and Round-Optimal. CCS 2023: 16-29 - [c18]Ward Beullens:
Graph-Theoretic Algorithms for the Alternating Trilinear Form Equivalence Problem. CRYPTO (3) 2023: 101-126 - [c17]Ward Beullens, Gregor Seiler:
LaBRADOR: Compact Proofs for R1CS from Module-SIS. CRYPTO (5) 2023: 518-548 - 2022
- [c16]Ward Beullens:
Breaking Rainbow Takes a Weekend on a Laptop. CRYPTO (2) 2022: 464-479 - [c15]Ward Beullens, Samuel Dobson, Shuichi Katsumata, Yi-Fu Lai, Federico Pintore:
Group Signatures and More from Isogenies and Lattices: Generic, Simple, and Efficient. EUROCRYPT (2) 2022: 95-126 - 2021
- [c14]Ward Beullens:
Improved Cryptanalysis of UOV and Rainbow. EUROCRYPT (1) 2021: 348-373 - [c13]Ward Beullens, Lucas Disson, Robi Pedersen, Frederik Vercauteren:
CSI-RAShi: Distributed Key Generation for CSIDH. PQCrypto 2021: 257-276 - [c12]Ward Beullens:
MAYO: Practical Post-quantum Signatures from Oil-and-Vinegar Maps. SAC 2021: 355-376 - 2020
- [c11]Ward Beullens, Shuichi Katsumata, Federico Pintore:
Calamari and Falafl: Logarithmic (Linkable) Ring Signatures from Isogenies and Lattices. ASIACRYPT (2) 2020: 464-492 - [c10]Ward Beullens:
Sigma Protocols for MQ, PKP and SIS, and Fishy Signature Schemes. EUROCRYPT (3) 2020: 183-211 - [c9]Ward Beullens, Cyprien Delpech de Saint Guilhem:
LegRoast: Efficient Post-quantum Signatures from the Legendre PRF. PQCrypto 2020: 130-150 - [c8]Ward Beullens:
Not Enough LESS: An Improved Algorithm for Solving Code Equivalence Problems over $\mathbb {F}_q$. SAC 2020: 387-403 - 2019
- [c7]Ward Beullens, Thorsten Kleinjung, Frederik Vercauteren:
CSI-FiSh: Efficient Isogeny Based Signatures Through Class Group Computations. ASIACRYPT (1) 2019: 227-247 - [c6]Ward Beullens, Jean-Charles Faugère, Eliane Koussa, Gilles Macario-Rat, Jacques Patarin, Ludovic Perret:
PKP-Based Signature Scheme. INDOCRYPT 2019: 3-22 - [c5]Ward Beullens, Hoeteck Wee:
Obfuscating Simple Functionalities from Knowledge Assumptions. Public Key Cryptography (2) 2019: 254-283 - 2018
- [c4]Ward Beullens, Simon R. Blackburn:
Practical Attacks Against the Walnut Digital Signature Scheme. ASIACRYPT (1) 2018: 35-61 - [c3]Ward Beullens, Bart Preneel, Alan Szepieniec:
Public Key Compression for Constrained Linear Signature Schemes. SAC 2018: 300-321 - 2017
- [c2]Ward Beullens, Bart Preneel:
Field Lifting for Smaller UOV Public Keys. INDOCRYPT 2017: 227-246 - [c1]Alan Szepieniec, Ward Beullens, Bart Preneel:
MQ Signatures for PKI. PQCrypto 2017: 224-240
Informal and Other Publications
- 2024
- [i28]Ward Beullens, Lucas Dodgson, Sebastian H. Faller, Julia Hesse:
The 2Hash OPRF Framework and Efficient Post-Quantum Instantiations. IACR Cryptol. ePrint Arch. 2024: 450 (2024) - [i27]Carsten Baum, Ward Beullens, Shibam Mukherjee, Emmanuela Orsini, Sebastian Ramacher, Christian Rechberger, Lawrence Roy, Peter Scholl:
One Tree to Rule Them All: Optimizing GGM Trees and OWFs for Post-Quantum Signatures. IACR Cryptol. ePrint Arch. 2024: 490 (2024) - [i26]Ward Beullens, Pierre Briaud, Morten Øygarden:
A Security Analysis of Restricted Syndrome Decoding Problems. IACR Cryptol. ePrint Arch. 2024: 611 (2024) - [i25]Ward Beullens:
Multivariate Blind Signatures Revisited. IACR Cryptol. ePrint Arch. 2024: 720 (2024) - [i24]Ward Beullens:
Improved Cryptanalysis of SNOVA. IACR Cryptol. ePrint Arch. 2024: 1297 (2024) - 2023
- [i23]Ward Beullens, Ming-Shing Chen, Shih-Hao Hung, Matthias J. Kannwischer, Bo-Yuan Peng, Cheng-Jhih Shih, Bo-Yin Yang:
Oil and Vinegar: Modern Parameters and Implementations. IACR Cryptol. ePrint Arch. 2023: 59 (2023) - [i22]Ward Beullens, Vadim Lyubashevsky, Ngoc Khanh Nguyen, Gregor Seiler:
Lattice-Based Blind Signatures: Short, Efficient, and Round-Optimal. IACR Cryptol. ePrint Arch. 2023: 77 (2023) - [i21]Ward Beullens, Luca De Feo, Steven D. Galbraith, Christophe Petit:
Proving knowledge of isogenies - A survey. IACR Cryptol. ePrint Arch. 2023: 671 (2023) - [i20]Ward Beullens, Fabio Campos, Sofía Celi, Basil Hess, Matthias J. Kannwischer:
Nibbling MAYO: Optimized Implementations for AVX2 and Cortex-M4. IACR Cryptol. ePrint Arch. 2023: 1683 (2023) - 2022
- [i19]Ward Beullens:
Breaking Rainbow Takes a Weekend on a Laptop. IACR Cryptol. ePrint Arch. 2022: 214 (2022) - [i18]Guillaume Barbu, Ward Beullens, Emmanuelle Dottax, Christophe Giraud, Agathe Houzelot, Chaoyun Li, Mohammad Mahzoun, Adrián Ranea, Jianrui Xie:
ECDSA White-Box Implementations: Attacks and Designs from WhibOx 2021 Contest. IACR Cryptol. ePrint Arch. 2022: 385 (2022) - [i17]Ward Beullens, Gregor Seiler:
LaBRADOR: Compact Proofs for R1CS from Module-SIS. IACR Cryptol. ePrint Arch. 2022: 1341 (2022) - [i16]Ward Beullens:
Graph-Theoretic Algorithms for the Alternating Trilinear Form Equivalence Problem. IACR Cryptol. ePrint Arch. 2022: 1528 (2022) - 2021
- [i15]Ward Beullens:
MAYO: Practical Post-Quantum Signatures from Oil-and-Vinegar Maps. IACR Cryptol. ePrint Arch. 2021: 1144 (2021) - [i14]Ward Beullens, Samuel Dobson, Shuichi Katsumata, Yi-Fu Lai, Federico Pintore:
Group Signatures and More from Isogenies and Lattices: Generic, Simple, and Efficient. IACR Cryptol. ePrint Arch. 2021: 1366 (2021) - 2020
- [i13]Ward Beullens, Cyprien Delpech de Saint Guilhem:
LegRoast: Efficient post-quantum signatures from the Legendre PRF. IACR Cryptol. ePrint Arch. 2020: 128 (2020) - [i12]Ward Beullens, Shuichi Katsumata, Federico Pintore:
Calamari and Falafl: Logarithmic (Linkable) Ring Signatures from Isogenies and Lattices. IACR Cryptol. ePrint Arch. 2020: 646 (2020) - [i11]Ward Beullens:
Not enough LESS: An improved algorithm for solving Code Equivalence Problems over 픽q. IACR Cryptol. ePrint Arch. 2020: 801 (2020) - [i10]Ward Beullens, Lucas Disson, Robi Pedersen, Frederik Vercauteren:
CSI-RAShi: Distributed key generation for CSIDH. IACR Cryptol. ePrint Arch. 2020: 1323 (2020) - [i9]Ward Beullens:
Improved Cryptanalysis of UOV and Rainbow. IACR Cryptol. ePrint Arch. 2020: 1343 (2020) - 2019
- [i8]Ward Beullens, Hoeteck Wee:
Obfuscating simple functionalities from knowledge assumptions. IACR Cryptol. ePrint Arch. 2019: 56 (2019) - [i7]Ward Beullens:
On sigma protocols with helper for MQ and PKP, fishy signature schemes and more. IACR Cryptol. ePrint Arch. 2019: 490 (2019) - [i6]Ward Beullens, Thorsten Kleinjung, Frederik Vercauteren:
CSI-FiSh: Efficient Isogeny based Signatures through Class Group Computations. IACR Cryptol. ePrint Arch. 2019: 498 (2019) - [i5]Ward Beullens, Tim Beyne, Aleksei Udovenko, Giuseppe Vitto:
Cryptanalysis of the Legendre PRF and generalizations. IACR Cryptol. ePrint Arch. 2019: 1357 (2019) - 2018
- [i4]Ward Beullens, Simon R. Blackburn:
Practical attacks against the Walnut digital signature scheme. IACR Cryptol. ePrint Arch. 2018: 318 (2018) - [i3]Ward Beullens, Bart Preneel, Alan Szepieniec:
Public Key Compression for Constrained Linear Signature Schemes. IACR Cryptol. ePrint Arch. 2018: 670 (2018) - 2017
- [i2]Alan Szepieniec, Ward Beullens, Bart Preneel:
MQ Signatures for PKI. IACR Cryptol. ePrint Arch. 2017: 327 (2017) - [i1]Ward Beullens, Bart Preneel:
Field lifting for smaller UOV public keys. IACR Cryptol. ePrint Arch. 2017: 776 (2017)
Coauthor Index
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