Below you can find the program for GelreCrypt 2025. We will keep this page regularly updated.
Tuesday, 4 November
Wednesday, 5 November
Thursday, 6 November
Friday, 7 November
20:00-22:00 Welcome & Registration
09:00-10:00 Early Morning Session
Welcome (±10 min)
Keynote:
Christoph Dobraunig .
Cryptography for Non-Traditional Applications (But not for MPC, FHE, and ZK)
(±30 min)
Open problems presentation (±20 min)
10:00-10:15 Coffee Break
10:15-11:25 Late Morning Session
Session chair: Clémence Bouvier
Tim Beyne, Michiel Verbauwhede .
Integral Cryptanalysis in Characteristic p (±35 min)
Marie Bolzer , Sébastien Duval, Marine Minier.
New Algorithms to Find Lightweight (AND,XOR) Implementations of S-boxes (±35 min)
11:25-12:30 Discussions
12:30-13:30 Lunch
13:30-14:45 Early Afternoon Session Session chair: Rachelle Heim Boissier
Yusuke Naito , Yu Sasaki, Takeshi Sugawara.
Authenticated Encryptions with Nonce-Based Key Derivations (±25 min)
Christina Boura, Patrick Derbez, Baptiste Germon , Rachelle Heim Boissier, María Naya-Plasencia.
SPEEDY: Caught at Last (±25 min)
Christof Beierle, Gregor Leander, Yevhen Perehuda .
When the Wrong Key Lives On: The Key-Recovery Procedure in Integral Attacks (±25 min)
14:45-15:00 Coffee Break
15:00-16:20 Late Afternoon Session Session chair: Morten Øygarden
Markku Juhani O. Saarinen .
The Cyber Resilience Act and Cryptography: The Story Thus Far (±45 min)
Cas Korporaal , Joan Daemen, Bernd Souvignier.
Relating the Density of Monomials in ANF's of Permutations to Cube Attacks (±25 min)
Anjan Roy .
A Case for Adopting Property-Based Testing in Cryptographic Software Libraries (±10 min)
16:20-18:00 Coffee Break + Discussions
09:00-10:00 Early Morning Session
Keynote:
Anne Canteaut .
Understanding Unexpected Fixed-Key Differential Behaviours
(±1h)
10:00-10:15 Coffee Break
10:15-11:15 Late Morning Session
Session chair: Jules Baudrin
Kai Hu , Zhongfeng Niu, Meiqin Wang.
Round-Based Approximation of (Higher-Order) Differential-Linear Correlation - A Geometric Approach Perspective (±30 min)
Patrick Felke, Katharina Koschatko , Christian Rechberger.
Algebraic Modeling of Lookup-Based AO Primitives (±10 min)
Siwei Sun, Shun Li, Zhiyu Zhang, Charlotte Lefevre , Bart Mennink, Zhen Qin, Dengguo Feng.
Permutation-Based Hashing With Stronger (Second) Preimage Resistance (±20 min)
11:15-12:30 Discussions
12:30-13:30 Lunch
13:30-14:35 Early Afternoon Session Session chair: Alexandre Bouez
Kazuhiko Minematsu , Akiko Inoue.
Revisiting Generic Transform to Committing Authenticated Encryption (±20 min)
Vahid Jahandideh, Jan Schoone , Lejla Batina.
Clustering Approach for Higher-Order Deterministic Masking (±45 min)
14:35-15:00 Coffee Break
15:00-16:00 Late Afternoon Session Session chair: Augustin Bariant
Marcel Nageler , Lorenz Schmid, Maria Eichlseder.
Preimage-type Attacks for Reduced Ascon-Hash: Application to Ed25519 (±25 min)
Joan Daemen, Silvia Mella, Konstantina Miteloudi, Morten Øygarden , Matthijs Poppe.
Algebraic Attacks and the Atrapos Design (±35 min)
16:00-18:00 Coffee Break + Discussions
09:00-10:00 Early Morning Session
Keynote:
Damian Vizár .
When Theory Meets Firmware: Cryptography in (not only) Embedded Systems
(±1h)
10:00-10:15 Coffee Break
10:15-11:20 Late Morning Session
Session chair: Hosein Hadipour
Antonio Flórez-Gutiérrez, Yosuke Todo .
Puncturing Technique and Application to Salsa and ChaCha (±30 min)
Stijn Maatje, Marc Stevens .
Cryptanalysis of the NSA Backdoor in the Philips UA-8295 (±35 min)
11:20-12:30 Discussions
12:30-13:30 Lunch
13:30-14:40 Mario's Session Session chair: Marcel Nageler
Mustafa Khairallah , Mario Marhuenda Beltrán.
New results on leakage-resilient symmetric-key cryptography (±35 min)
Charlotte Lefevre, Mario Marhuenda Beltrán .
MacaKey: Full-State Keyed Sponge Meets the Summation-Truncation Hybrid (±35 min)
14:40-15:00 Coffee Break
15:00-16:20 Late Afternoon Session Session chair: Jérôme Govinden
Donghoon Chang, Yu Long Chen, Yukihito Hiraga, Kazuhiko Minematsu, Nicky Mouha, Yusuke Naito, Yu Sasaki , Takeshi Sugawara.
Key Committing Security of HCTR2, Revisited (±35 min)
Aron Gohr, Gregor Leander , Lukas Stennes.
BOMBE: Benchmark of Model-Based Breaking of Encryption (±15 min)
Joan Daemen, Koustabh Ghosh , Ronny Wichers Schreur.
Computing the Differential Probability of Trails in Permutations (±30 min)
16:20-18:00 Coffee Break + Discussions
Organizers
Yanis Belkheyar — Radboud University, The Netherlands
Charlotte Lefevre — Radboud University, The Netherlands
Bart Mennink — Radboud University & Maastricht University, The Netherlands
Participants
Augustin Bariant
Jules Baudrin
Yanis Belkheyar
Marie Bolzer
Xavier Bonnetain
Alexandre Bouez
Christina Boura
Clémence Bouvier
Anne Canteaut
Joan Daemen
Patrick Derbez
Christoph Dobraunig
Patrick Felke
Baptiste Germon
Koustabh Ghosh
Jérôme Govinden
Lorenzo Grassi
Hosein Hadipour
Rachelle Heim Boissier
Kai Hu
Ashwin Jha
Mustafa Khairallah
Cas Korporaal
Katharina Koschatko
Virginie Lallemand
Nils Gregor Leander
Charlotte Lefevre
Gaëtan Leurent
Mario Marhuenda Beltrán
Pierrick Méaux
Silvia Mella
Bart Mennink
Kazuhiko Minematsu
Marcel Nageler
Yusuke Naito
María Naya-Plasencia
Patrick Neumann
Morten Øygarden
Yevhen Perehuda
Shahram Rasoolzadeh
Berenika Richterová
Ricardo Rodriguez Reveco
Sondre Rønjom
Anjan Roy
Yann Rotella
Kosei Sakamoto
Markku-Juhani Saarinen
Yu Sasaki
André Schrottenloher
Yaobin Shen
Martijn Stam
Marc Stevens
Patrick Struck
Tyge Tiessen
Yosuke Todo
Gilles Van Assche
Bart Van Vulpen
Michiel Verbauwhede
Damian Vizár
Qingju Wang
Venues
The workshop will be held at Lindenberg Cultuurhuis.
Directions
The cultuurhuis is located in the city center, a 20 minutes walk from the central station.
Accommodation
The venue itself does not have appropriate accommodation, but you can stay at various hotels in city center.
The reception will be held at the Belvédère.
Address
Belvédère
Kelfkensbos 60
6511 TB Nijmegen
The Netherlands
Directions
The Belvédère is located near the city center, next to the Valkhof Park, and within a 5-minute walk of the workshop venue.
The dinner will be held at Humphrey's.
Address
Humphrey's
Mariënburg 59
6511 PS Nijmegen
The Netherlands
If you are looking for places to eat, drink, relax, visit, or buy gifts, we made a list here
yanis.belkheyar@ru.nl
