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751 results

    • Seminar

    • SemSecuElec

    libecc: a flexible open-source ECC library for embedded devices

    • February 14, 2020

    • ANSSI - Salle Pétri/Turing

    Speaker : Ryad Benadjila et Arnaud Ebalard

    libecc is a software library for elliptic curves based cryptography (ECC), with an API supporting signature algorithms specified in the ISO14888-3 standard.Advanced usages of this library also include the possible implementation of elliptic curve based Diffie-Hellman protocols as well as any algorithm on top of prime fields based elliptic curves (or prime fields, or rings of integers).The[…]

    • Seminar

    • SemSecuElec

    Une approche pour l’accélération matérielle pour le chiffrement homomorphe

    • December 14, 2018

    • CEA List

    Speaker : Joël Cathebras

    Le chiffrement homomorphe est un outil cryptographique permettant la manipulation de données en aveugle. Son utilisation généralisée permettrait de proposer des solutions de calcul déporté impliquant des données confidentielles, par exemple des données génomiques pour la médecine personnalisée. Cependant, le chiffrement homomorphe doit faire face à de grandes complexités mémoires et calculatoires.[…]

    • Seminar

    • SemSecuElec

    Code-based postquantum cryptography : candidates to standardization

    • April 23, 2021

    • INRIA - Web-Conférence

    Speaker : Nicolas Sendrier

    At the third round of the NIST standardization process, three candidates remain with a security based on error correcting codes, all are key exchange mechanisms. We will explore them according to their security assumptions and properties. Among them, we find an historical scheme (Classic McEliece), as well as schemes using sparse and quasi-cyclic matrices (BIKE and HQC). We will examine pros and[…]

    • Seminar

    • SemSecuElec

    Side Channel Analysis: Instruction extraction and Information estimation

    • May 06, 2022

    • CEA-LETI; Université de Montpellier, LIRMM - Salle Pétri/Turing

    Speaker : Valence Cristiani

    Side-channel usually aims at extracting cryptographic secrets from electronic devices through their physical leakages. However, these channels can leak other sensitive information. The first part of this talk will present a study of side channel-based disassembling (SCBD) that aims to recover instructions executed by a microcontroller. The main threat represented by SCBD is that it potentially[…]

    • Seminar

    • SemSecuElec

    Do Not Trust Modern System-on-Chips - Electromagnetic fault injection against a System-on-Chip

    • May 10, 2019

    • INRIA - Salles Petri/Turing

    Speaker : Ronan Lashermes

    Electromagnetic fault injection (EMFI) is a well known technique to disturb the behavior of a chip and weaken its security. These attacks are still mostly done on simple microcontrollers since the fault effects is relatively simple and understood.Unlocking EMFI on modern System-on-Chips (SoCs), the fast and complex chips ubiquitous today, requires to understand the impact of the faults. In this[…]

    • Seminar

    • Cryptography

    On Rejection Sampling in Lyubashevsky's Signature Scheme

    • May 06, 2022

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

    Speaker : Julien Devevey - ENS de Lyon

    Lyubashevsky’s signatures are based on the Fiat-Shamir with aborts paradigm, whose central ingredient is the use of rejection sampling to transform (secret-key-dependent) signature samples into samples from a secret-key-independent distribution. The choice of these two underly- ing distributions is part of the rejection sampling strategy, and various instantiations have been considered up to this[…]
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