Table of contents

682 results

  • Endomorphisms via Splittings

    • April 10, 2026 (13:45 - 14:45)

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

    Speaker : Min-Yi Shen - No Affiliation

    One of the fundamental hardness assumptions underlying isogeny-based cryptography is the problem of finding a non-trivial endomorphism of a given supersingular elliptic curve. In this talk, we show that the problem is related to the problem of finding a splitting of a principally polarised superspecial abelian surface. In particular, we provide formal security reductions and a proof-of-concept[…]

    • Cryptography

  • Journées C2: pas de séminaire

    • April 03, 2026 (13:45 - 14:45)

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

  • Algorithms for post-quantum commutative group actions

    • March 27, 2026 (13:45 - 14:45)

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

    Speaker : Marc Houben - Inria Bordeaux

    At the historical foundation of isogeny-based cryptography lies a scheme known as CRS; a key exchange protocol based on class group actions on elliptic curves. Along with more efficient variants, such as CSIDH, this framework has emerged as a powerful building block for the construction of advanced post-quantum cryptographic primitives. Unfortunately, all protocols in this line of work are[…]

  • Privacy-preserving collaboration for intrusion detection in distributed systems

    • March 27, 2026 (11:00 - 12:00)

    • Inria Center of the University of Rennes - Room Markov

    Speaker : Léo Lavaur - Université du Luxembourg

    The emergence of Federated Learning (FL) has rekindled the interest in collaborative intrusion detection systems, which were previously limited by the risks of information disclosure associated with data sharing. But is it a good collaboration tool? Originally designed to train prediction models on distributed consumer data without compromising data confidentiality, its use as a collaborative[…]

    • SoSysec

    • Privacy

    • Intrusion detection

    • Distributed systems

  • Lightweight (AND, XOR) Implementations of Large-Degree S-boxes

    • March 20, 2026 (13:45 - 14:45)

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

    Speaker : Marie Bolzer - LORIA

    The problem of finding a minimal circuit to implement a given function is one of the oldest in electronics. In cryptography, the focus is on small functions, especially on S-boxes which are classically the only non-linear functions in iterated block ciphers. In this work, we propose new ad-hoc automatic tools to look for lightweight implementations of non-linear functions on up to 5 variables for[…]

    • Cryptography

    • Symmetrical primitive

    • Implementation of cryptographic algorithm

  • Double Strike: Breaking Approximation-Based Side-Channel Countermeasures for DNNs

    • March 20, 2026 (11:00 - 12:00)

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

    Speaker : Lorenzo CASALINO - CentraleSupélec

    Deep neural networks (DNNs) undergo lengthy and expensive training procedures whose outcome - the DNN weights - represents a significant intellectual property asset to protect. Side-channel analysis (SCA) has recently appeared as an effective approach to recover this confidential asset of DNN implementations. Ding et al. (HOST’25) introduced MACPRUNING, a novel SCA countermeasure based on pruning,[…]

    • SemSecuElec

    • Side-channel

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