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    • Seminar

    • SemSecuElec

    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

    • Seminar

    • SoSysec

    The Quest for my Perfect MATE. Investigate MATE: Man-at-the-End attacker (followed by a hands-on application). 

    • February 11, 2026 (16:00 - 17:30)

    • Pôle Numérique Rennes Beaulieu (PNRB)

    Speaker : Mohamed Sabt, Etienne Nedjaï - Univ Rennes, IRISA

    Shannon sought security against an attacker with unlimited computational powers: if an information source conveys some information, then Shannon’s attacker will surely extract that information. Diffie and Hellman refined Shannon’s attacker model by taking into account the fact that the real attackers are computationally limited. This idea became one of the greatest new paradigms in computer[…]

    • Seminar

    • SoSysec

    Les jeux vidéo de l’écran au réel : enjeux juridiques et (géo)politiques au prisme de la cybersécurité

    • February 11, 2026 (14:00 - 15:30)

    • Pôle Numérique Rennes Beaulieu (PNRB)

    Speaker : Léandre Lebon, Sandrine Turgis - Univ Rennes, IODE

    Protection des droits d’auteur, lutte contre les techniques de triche, interactions avec la guerre et les conflits hybrides, enjeux de démocratie ... Sous l’angle de la cybersécurité les enjeux juridiques et (géo)politiques des jeux video sont nombreux. Cette présentation du groupe de travail sur les jeux video (GTJV) permettra d’alimenter la réflexion sur l’articulation entre jeux video et[…]

    • Law

    • Seminar

    • Cryptography

    Attacks and Remedies for Randomness in AI: Cryptanalysis of PHILOX and THREEFRY

    • March 13, 2026 (13:45 - 14:45)

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

    Speaker : Yevhen Perehuda - Ruhr-University Bochum

    In this work, we address the critical yet understudied question of the security of the most widely deployed pseudorandom number generators (PRNGs) in AI applications. We show that these generators are vulnerable to practical and low-cost attacks. With this in mind, we conduct an extensive survey of randomness usage in current applications to understand the efficiency requirements imposed in[…]

    • Cryptography

    • Seminar

    • 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

    • Seminar

    • Cryptography

    On the average hardness of SIVP for module lattices of fixed rank

    • March 06, 2026 (13:45 - 14:45)

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

    Speaker : Radu Toma - Sorbonne Université

    In joint work with Koen de Boer, Aurel Page, and Benjamin Wesolowski, we study the hardness of the approximate Shortest Independent Vectors Problem (SIVP) for random module lattices. We use here a natural notion of randomness as defined originally by Siegel through Haar measures. By proving a reduction, we show it is essentially as hard as the problem for arbitrary instances. While this was[…]
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