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677 results

    • Seminar

    • Cryptography

    Speeding up Fully Homomorphic Encryption

    • June 10, 2016

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

    Speaker : Marie Paindavoine - Orange Labs

    Access to encrypted data is often “all-or-nothing” : either one has to decrypt everything, or one cannot read anything. Following Gentry’s work in 2009, fully homomorphic encryption has gained more and more attention, in particular because it allows more flexibility on encrypted data access and process. It is now possible to evaluate functions on encrypted data and get only the result – encrypted[…]

    • Seminar

    • Cryptography

    Algorithms for polynomial selection in the number field sieve

    • December 18, 2015

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

    Speaker : Shi Bai - Australian National University

    The general number field sieve (GNFS) is the most efficient algorithm known for factoring large integers. It consists of several stages, the first one being polynomial selection. The running-time of the number field sieve depends on the quality of the chosen polynomials. The quality of the chosen polynomials can be modeled in terms of size and root properties. In this talk, we will describe some[…]

    • Seminar

    • Cryptography

    Symmetric Encryption Scheme adapted to Fully Homomorphic Encryption Scheme

    • September 30, 2016

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

    Speaker : Pierrick Méaux - ENS Paris

    Fully Homomorphic Encryption is a powerful cryptographic construction, enabling to securely compute all functions on encrypted data, and decrypt the result of the function applied on the real data.<br/> This construction allows to securely delegate computation, which is a very important property with the increasing of the Cloud computing. Many client-server applications are appearing, all needing[…]

    • Seminar

    • Cryptography

    Soutenance de thèse

    • July 03, 2015

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

    Speaker : Tristan Vaccon - IRMAR

    • Seminar

    • Cryptography

    Fonction de hachage et protection de la vie privée

    • April 22, 2016

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

    Speaker : Cédric Lauradoux - INRIA

    Les fonctions de hachage à sens unique sont très utilisées pour générer des pseudonymes et anonymiser des données. Le résultat obtenu est rarement à la hauteur des espoirs mis dans le hachage. Dans de nombreux cas, on a pu ré-identifier des bases de données anonymiser avec des fonctions de hachage. Dans cet exposé, nous reviendrons sur les garanties d'anonymat (anonymity-set-size ou k-anonymity)[…]

    • Seminar

    • Cryptography

    Cryptography, Encryption, and Big Data

    • November 06, 2015

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

    Speaker : Hoeteck Wee - ENS

    We live in an era of "Big Data", wherein a deluge of data is being generated, collected, and stored all around us. In order to protect this data, we need to encrypt it. This raises a fundamentally new challenge in cryptography: Can we encrypt data while enabling fine-grained access control and selective computation, as is necessary to protect big, complex data? In this talk, I will present my work[…]
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