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702 résultats

    • Séminaire

    • SemSecuElec

    Unique CAD-compatible SCA-security mechanisms, externally amplified coupling (EAC) attacks and (some) connection

    • 25 juin 2021

    • Bar-Ilan University (BIU) - Web-Conférence

    Orateur : Itamar Levi

    In this seminar I will first discuss unique computer aided design (CAD) compatible SCA security mechanisms. I will present an approach which can significantly increase the physical security-level of a design, be implemented with conventional design-tools and which does not require any special technological-support. The method consists with a correct by-design utilization of power-management[…]

    • Séminaire

    • SemSecuElec

    Automated software protection for the masses against side-channel attacks

    • 10 mai 2019

    • Univ Grenoble Alpes, CEA, List - Salles Petri/Turing

    Orateur : Nicolas Belleville

    This presentation will present an approach and a tool that answer the need for effective, generic, and easily applicable protections against side-channel attacks. The protection mechanism is based on code polymorphism, so that the observable behaviour of the protected component is variable and unpredictable to the attacker. Our approach combines lightweight specialized runtime code generation with[…]

    • Séminaire

    • Cryptographie

    New Representations of the AES Key Schedule

    • 10 juin 2022

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

    Orateur : Clara Pernot - INRIA Paris

    In this talk we present a new representation of the AES key schedule, with some implications to the security of AES-based schemes. In particular, we show that the AES-128 key schedule can be split into four independent parallel computations operating on 32 bits chunks, up to linear transformation. Surprisingly, this property has not been described in the literature after more than 20 years of[…]

    • Séminaire

    • Cryptographie

    Fault tolerant algorithms via decoding: Interleaving techniques

    • 17 juin 2022

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

    Orateur : Eleonora Guerrini - Université Montpellier

    Evaluation Interpolation algorithms are a key tool for the algebraic decoding of a large class of codes, including the famous Reed Solomon codes. Recent techniques allow the use of this type of decoding in the more general setting of fault tolerant algorithms, where one has to interpolate erroneous data (potentially computed by an untrusted entity). In this talk we will present algorithms to[…]

    • Séminaire

    • Cryptographie

    Isogenies over Hessian Model of Elliptic Curves

    • 03 juin 2022

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

    Orateur : Emmanuel Fouotsa - Université de Bamenda

    In this talk we present explicit formulas for isogenies between elliptic curves in (twisted) Hessian form. We examine the numbers of operations in the base field to compute the formulas. In comparison with other isogeny formulas, we note that the obtained formulas for twisted Hessian curves have the lowest costs for processing the kernel and the X-affine formula has the lowest cost for processing[…]

    • Séminaire

    • Cryptographie

    Soutenance de thèse: Algebraic Cryptanalysis of the Shortest Vector Problem in Ideal Lattices

    • 13 juin 2022

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

    Orateur : Olivier Bernard - Rennes

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