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733 results

    • Seminar

    • Cryptography

    Updatable Public Key Encryption with Lattices

    • February 23, 2024

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

    Speaker : Calvin Abou-Haidar - ENS Lyon

    Updatable public key encryption has recently been introduced as a so- lution to achieve forward-security in the context of secure group messaging without hurting efficiency, but so far, no efficient lattice-based instantia- tion of this primitive is known. In this work, we construct the first LWE-based UPKE scheme with polynomial modulus-to-noise rate, which is CPA-secure in the standard model. At[…]

    • 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

    How to decrypt without keys with GlobalPlatform SCP02 protocol

    • July 06, 2018

    • Inria Center of the University of Rennes - - See the page of each talk for the room.

    Speaker : par Loic Ferreira (Orange Labs, IRISA)

    The GlobalPlatform SCP02 protocol is a security protocol implemented in smart cards, and used by transport companies, in the banking world and by mobile network operators (UICC/SIM cards). We describe how to perform a padding oracle attack against SCP02. The attack allows an adversary to efficiently retrieve plaintext bytes from an encrypted data field. We provide results of our experiments done[…]

    • Seminar

    • SoSysec

    Breaking and fixing HB+DB: A Short Tale of Provable vs Experimental Security and Lightweight Designs

    • February 02, 2018

    • Inria Center of the University of Rennes - - See the page of each talk for the room.

    Speaker : Ioana Boureanu (University of Surrey)

    HB+ is a well-know authentication scheme purposely designed to be lightweight. However, HB+ is vulnerable to a key-recovery, man-in-the-middle (MiM) attack dubbed GRS. To this end, at WiSec2015, the HB+DB protocol added a distance-bounding dimension to HB+, which was experimentally shown to counteract the GRS attack.In this talk, we will exhibit however a number of security flaws in the HB+DB[…]

    • Seminar

    • SoSysec

    Voting : You Can’t Have Privacy without Individual Verifiability

    • March 01, 2019

    • Inria Center of the University of Rennes - - See the page of each talk for the room.

    Speaker : Joseph Lallemand (Loria)

    Electronic voting typically aims at two main security goals: vote privacy and verifiability. These two goals are often seen as antagonistic and some national agencies even impose a hierarchy between them: first privacy, and then verifiability as an additional feature. Verifiability typically includes individual verifiability (a voter can check that her ballot is counted); universal verifiability […]
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