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722 results

    • Seminar

    • Cryptography

    Finding short integer solutions when the modulus is small

    • November 24, 2023

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

    Speaker : Eamonn Postlethwaite - King's College London

    We present cryptanalysis of the inhomogenous short integer solution (ISIS) problem for anomalously small moduli by exploiting the geometry of BKZ reduced bases of q-ary lattices. We apply this cryptanalysis to examples from the literature where taking such small moduli has been suggested. A recent work [Espitau–Tibouchi–Wallet–Yu, CRYPTO 2022] suggests small versions of the lattice signature[…]

    • Seminar

    • Cryptography

    Quantum Linear Key-recovery Attacks Using the QFT

    • February 09, 2024

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

    Speaker : André Schrottenloher - IRISA

    The Quantum Fourier Transform is a fundamental tool in quantum cryptanalysis, not only as the building block of Shor's algorithm, but also in attacks against symmetric cryptosystems. Indeed, hidden shift algorithms such as Simon's (FOCS 1994), which rely on the QFT, have been used to obtain attacks on some very specific block cipher structures. The Fourier Transform is also used in classical[…]

    • Working group

    Modélisation statistique et sécurité des générateurs d'aléa pour la cryptographie

    • April 08, 2023 (11:00 - 12:00)

    • À l'IRISA, campus de Beaulieu, Rennes

    Speaker : David Lubicz - DGA, IRMAR

    Dans cet exposé on essaie d'expliquer ce que l'on entend pas méthodes statistiques et on donne des exemples concrets d'application dans la cybersécurité.

    • Cryptography

    • Working group

    Analyse statistique des extrêmes pour la modélisation d'évènements rares ou atypiques

    • April 08, 2023 (10:00 - 11:00)

    • À l'IRISA, campus de Beaulieu, Rennes

    Speaker : Gilles Stupfler - ENSAI

    • Seminar

    • SoSysec

    Anonymous Server-Aided Verification

    • March 30, 2018

    • Inria Center of the University of Rennes - - Room TBD

    Speaker : par Elena Pagnin (Chalmers University of Technology, Sweden)

    Server-Aided Verification (SAV) is a method that can be employed to speed up the process of verifying signatures by letting the verifier outsource part of its computation load to a third party. Achieving fast and reliable verification under the presence of an untrusted server is an attractive goal in cloud computing and internet of things scenarios.In this talk I will describe a simple and[…]

    • Seminar

    • SoSysec

    Présentation des fondamentaux du management du risque et d’EBIOS Risk Manager

    • November 29, 2019

    • Inria Center of the University of Rennes - - Room TBD

    Speaker : Vincent Loriot (ANSSI)

    Résumé :a. Présentation ANSSIb. Tendances de la menace cyber et démarche pour s’en protégerc. Fondamentaux de la méthode EBIOS Risk ManagerLa présentation théorique sera complétée avec un atelier pratique couvrant les sujets suivants :a. Les besoins et enjeux de sécuritéb. Les couples Source de Risque / Objectif Viséc. La cartographie de menace de l’écosystème 
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