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    • Seminar

    • Cryptography

    Oblivious Transfer from Zero-Knowledge Proofs (or how to achieve round-optimal quantum Oblivious Transfer without structure)

    • June 06, 2025 (13:45 - 14:45)

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

    Speaker : Léo Colisson - Université Grenoble Alpes

    We provide a generic construction to turn any classical Zero-Knowledge (ZK) protocol into a composable oblivious transfer (OT) protocol (the protocol itself involving quantum interactions), mostly lifting the round-complexity properties and security guarantees (plain-model/statistical security/unstructured functions…) of the ZK protocol to the resulting OT protocol. Such a construction is unlikely[…]
    • Cryptography

    • Seminar

    • SemSecuElec

    PhaseSCA: Exploiting Phase-Modulated Emanations in Side Channels

    • November 28, 2025 (10:00 - 11:00)

    • Inria Center of the University of Rennes - Espace de conférences

    Speaker : Pierre Ayoub - LAAS-CNRS

    In recent years, the limits of electromagnetic side-channel attacks have been significantly expanded.However, while there is a growing literature on increasing attack distance or performance, the discovery of new phenomenons about compromising electromagnetic emanations remains limited. In this work, we identify a novel form of modulation produced by unintentional electromagnetic emanations: phase[…]
    • Side-channel

    • Seminar

    • SemSecuElec

    Fine-grained dynamic partitioning against cache-based side channel attacks

    • June 27, 2025 (10:00 - 11:00)

    • Inria Center of the University of Rennes - Espace de conférences

    Speaker : Nicolas Gaudin - Trasna

    The growth of embedded systems takes advantage of architectural advances from modern processors to increase performance while maintaining a low power consumption. Among these advances is the introduction of cache memory into embedded systems. These memories speed up the memory accesses by temporarily storing data close to the execution core. Furthermore, data from different applications share the[…]
    • SemSecuElec

    • Micro-architectural vulnerabilities

    • Hardware architecture

    • Seminar

    • SemSecuElec

    PHOENIX : the first crypto-agile hardware solution for ML-KEM and HQC

    • April 25, 2025 (11:00 - 12:00)

    • Inria Center of the University of Rennes - Espace de conférences

    Speaker : Antonio RAS

    The security of the public-key cryptography protecting today and tomorrow's communication is threatened by the advent of quantum computers. To address this challenge, post-quantum cryptography is employed to devise new quantum-resistant cryptosystems. The National Institute of Standards and Technology (NIST), which led the quantum-safe transition, has already standardized the first lattice KEM[…]
    • Cryptography

    • SemSecuElec

    • Hardware accelerator

    • Seminar

    • Cryptography

    Cycles of pairing-friendly abelian varieties

    • March 28, 2025 (13:45 - 14:45)

    • Salle Guernesey, ISTIC

    Speaker : Maria Corte-Real Santos - ENS Lyon

    A promising avenue for realising scalable proof systems relies on the existence of 2-cycles of pairing-friendly elliptic curves. More specifically, such a cycle consists of two elliptic curves E/Fp and E’/Fq that both have a low embedding degree and also satisfy q = #E(Fp) and p = #E’(Fq). These constraints turn out to be rather restrictive; in the decade that has passed since 2-cycles were first[…]
    • Cryptography

    • Seminar

    • Cryptography

    Constant-time lattice reduction for SQIsign

    • March 14, 2025 (13:45 - 14:45)

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

    Speaker : Sina Schaeffler - IBM Research

    SQIsign is an isogeny-based signature scheme which has recently advanced to round 2 of NIST's call for additional post-quantum signatures. A central operation in SQIsign is lattice reduction of special full-rank lattices in dimension 4. As these input lattices are secret, this computation must be protected against side-channel attacks. However, known lattice reduction algorithms like the famous[…]