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    • Seminar

    • Cryptography

    Cyclotomic Cosets: Hidden Subgroup and Quantum Sieving Algorithm for Prime-Power Moduli

    • November 06, 2026 (13:45 - 14:45)

    • salle markov - G105 à l'IRISA - Si vous êtes extérieur.e à l'IRISA, inscrivez-vous sur ce formulaire: https://evento.renater.fr/survey/seminaire-du-6-11-bil6wt46 . Présentez-vous à l'accueil du bâtiment muni.e d'une pièce d'identité.

    Speaker : Mathias Boucher - Université de Rennes

    The Dihedral Coset Problem (DCP), also known as the hidden shift problem, plays a fundamental role in post-quantum public-key cryptography, since the Learning-With-Error problem reduces to DCP. The “Simon meets Kuperberg” quantum algorithm by Bonnetain and Naya-Plasencia solves the DCP in quasi-polynomial time when the modulus is a power of two. We provide a generalization of this algorithm for[…]

    • Seminar

    • Cryptography

    Adelic reduction of module lattices

    • November 13, 2026 (13:45 - 14:45)

    • IRMAR - Université de Rennes - Campus Beaulieu Bat. 22, RDC, Rennes - Amphi Lebesgue

    Speaker : Henry Bambury - DGA-MI et Inria Rennes

    We give a strict generalisation of the LLL algorithm over number fields, based on the reduction theory of  $GL(n)$ over the adele ring of a number field. Our algorithm is free of heuristics, with rigorous bounds on output quality and complexity.   -- based on joint work with Seungki Kim, Changmin Lee and Phong Nguyen --

    • Cryptography

    • Seminar

    • SemSecuElec

    Compositional Semantics for Detection and Defense of Speculative Leaks

    • February 12, 2027 (11:00 - 12:00)

    • IETR - University of Rennes - Campus de BEAULIEU - Bâtiment 11D, salle numéro 18

    Speaker : Xaver Fabian - CISPA Helmholtz Center for Information Security

    Speculative execution improves CPU performance but introduces vulnerabilities, known as Spectre attacks, which exploit microarchitectural side effects to leak sensitive data. Modern processors employ multiple interacting speculation mechanisms, yet existing approaches predominantly analyze them in isolation, which limits both the automated detection of complex leaks and the formal verification of[…]

    • SemSecuElec

    • Side-channel

    • Micro-architectural vulnerabilities

    • Upcoming

    • Conference

    • Cryptography

    PQC 2026 - Post-Quantum Cryptography conference

    • From November 18, 2026 to November 19, 2026 (09:00 - 18:00)

    • Couvent des Jacobins (Metro lines A & B, Station: Sainte-Anne) - 20 place Sainte-Anne, 35000 Rennes

    Building on the 2021, 2022 and 2024 editions, CREACH LABS and the DGA Information Superiority organise with the support of ANSSI, IRISA, IRMAR and the Pôle d'Excellence Cyber the 4th edition of the Post-Quantum Cryptography workshop during the European Cyber Week 2026.

  • PQC 2026 : Call for poster proposals

    CREACH LABS is pleased to invite you to submit a proposal for the poster session to be held as part of the “PQC 2026 – Post-Quantum Cryptography” conference, scheduled for 18 and 19 November 2026 at the Couvent des Jacobins in Rennes (France), as part of the 11th of European Cyber Week.
    September 06, 2026

    • Seminar

    • Cryptography

    Post-quantum day of the cryptography seminar

    • November 20, 2026 (09:30 - 15:15)

    • Amphithéâtre E - Bâtiment 02A, Campus de Beaulieu - A map of the Beaulieu campus can be viewed at: https://www.univ-rennes.fr/en/beaulieu-campus-map (the building is south of the campus)

    A scientific day devoted to post-quantum cryptography, held in the wake of the European Cyber Week, with talks more technical than those presented at the ECW. The talks will take place at Amphi E in building 02A. To register for lunch, please do so before oct 30th using this link. 
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