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633 results

    • Seminar

    • Cryptography

    Fault tolerant algorithms via decoding: Interleaving techniques

    • June 17, 2022

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

    Speaker : 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[…]

    • Seminar

    • Cryptography

    Isogenies over Hessian Model of Elliptic Curves

    • June 03, 2022

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

    Speaker : 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[…]

    • Seminar

    • Cryptography

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

    • June 13, 2022

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

    Speaker : Olivier Bernard - Rennes

    • Seminar

    • Cryptography

    Constant time techniques for lattice based cryptography

    • January 24, 2020

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

    Speaker : Melissa Rossi - École normale supérieure, CNRS, PSL University, Inria

    NIST’s post-quantum cryptography competition has entered in its second phase, the time has come to focus more closely on practical aspects of the candidates. On the lattice-based side, certain schemes chose to implement discrete Gaussian distributions which allow better parameters and security reductions. However, this advantage has also proved to be their Achilles’ heel, as discrete Gaussians[…]

    • Seminar

    • Cryptography

    https://seminaire-c2.inria.fr/

    • October 15, 2021

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

    Speaker : Séminaire C2 - Paris

    • Seminar

    • Cryptography

    Candidats NIST basés sur les réseaux: choix de conception et astuces de ninja

    • March 25, 2020

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

    Speaker : Thomas Prest. - PQShield

    Parmi les 26 schémas post-quantique toujours considérés pour standardisation par le NIST, 12 sont basés sur les réseaux (3 schémas de signature et 9 schémas de chiffrement). Cette présentation leur est consacrée. A haut niveau, tous peuvent être interprétés comme des instanciations directes de paradigmes bien établis. Mais une analyse plus attentive révèle que chacun d'eux fait des choix de[…]
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