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634 résultats

• • Séminaire

  • Cryptographie

  Generic Attack on Duplex-Bases AEAD Modes using Random Function Statistics

  • 22 septembre 2023

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

  Orateur : Rachelle Heim Boissier - Inria

  Duplex-based authenticated encryption modes with a sufficiently large key length are proven to be secure up to the birthday bound 2^(c/2), where c is the capacity. However this bound is not known to be tight and the complexity of the best known generic attack, which is based on multicollisions, is much larger: it reaches 2^c/α where α represents a small security loss factor. There is thus an[…]

• • Séminaire

  • Cryptographie

  Password-Authenticated Key Exchange (PAKE) from Isogenies

  • 08 décembre 2023

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

  Orateur : Sabrina Kunzweiler - Université Bordeaux

  The passwords that we use in our everyday life are often chosen to be easily memorable which makes them vulnerable to attacks. This problem is addressed by password-authenticated key exchange (PAKE). The general idea is to enable two parties who share the same (potentially weak) password to establish a strong session key. Most PAKE protocols used today are based on Diffie-Hellman key exchange in[…]

• • Séminaire

  • Cryptographie

  Updatable Public Key Encryption with Lattices

  • 23 février 2024

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

  Orateur : 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[…]

• • Groupe de travail

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

  • 08 avril 2023 (11:00 - 12:00)

  • À l'IRISA, campus de Beaulieu, Rennes

  Orateur : 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.

  • Cryptographie

• • Groupe de travail

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

  • 08 avril 2023 (10:00 - 11:00)

  • À l'IRISA, campus de Beaulieu, Rennes

  Orateur : Gilles Stupfler - ENSAI

• • Séminaire

  • SoSysec

  The Internet of Backdoors

  • 07 mars 2018

  • Inria Center of the University of Rennes - -Petri/Turing room

  Orateur : par Sam L. Thomas (University of Birmingham, UK)

  Complex embedded devices are becoming ever prevalent in our everyday lives, yet only a tiny amount of people consider the potential security and privacy implications of attaching such devices to our home, business and government networks. As demonstrated through recent publications from academia and blog posts from numerous industry figures, these devices are plagued by poor design choices[…]