Filtrer par type de contenu
Sélectionnez un ou plusieurs filtres. Ce choix permettra de recharger la page pour afficher les résultats filtrés.
656 résultats
-
-
Séminaire
-
Cryptographie
Efficient Implementation of Ideal Lattice-Based Cryptography on Embedded Devices
Orateur : Thomas Pöppelmann - Infineon Technologies AG
Novel public-key cryptosystems beyond RSA and ECC are urgently required to ensure long-term security in the era of quantum computing. One alternative to such established schemes is ideal lattice-based cryptography which offers elegant security reductions and versatile cryptographic building blocks such as the ring learning with errors (RLWE) problem. In this talk we will give an overview on[…] -
-
-
Séminaire
-
Cryptographie
Gröbner Bases Techniques in Post-Quantum Cryptography
Orateur : Ludovic Perret - LIP6
After the publication of Shor's algorithm, it became evident the most popular public-key cryptographic systems that rely on the integer factorization problem or on the discrete logarithm problem would be easily solvable using large enough quantum computers (if such quantum computers are ever built). That triggered a vivid interest in the research of cryptographic algorithms (mostly public-key[…] -
-
-
Séminaire
-
Cryptographie
Sanitization of FHE Ciphertexts
Orateur : Damien Stehlé - ENS Lyon
By definition, fully homomorphic encryption (FHE) schemes support homomorphic decryption, and all known FHE constructions are bootstrapped from a Somewhat Homomorphic Encryption (SHE) scheme via this technique. Additionally, when a public key is provided, ciphertexts are also re-randomizable, e.g. by adding to them fresh encryptions of~$0$. From those two operations we devise an algorithm to[…] -
-
-
Séminaire
-
Cryptographie
Multilinear Maps from Obfuscation
Orateur : Pooya Farshim - ENS Paris
We provide constructions of multilinear groups equipped with natural hard problems from indistinguishability obfuscation, homomorphic encryption, and NIZKs. This complements known results on the constructions of indistinguishability obfuscators from multilinear maps in the reverse direction.<br/> We provide two distinct, but closely related constructions and show that multilinear analogues of the[…] -
-
-
Séminaire
-
Cryptographie
Journée de rentrée
Orateur : Géométrie et Algèbre Effectives - IRMAR
Divers exposés. -
-
-
Séminaire
-
Cryptographie
Vers une mise en œuvre pratique du chiffrement homomorphe
Orateur : Renaud Sirdey - CEA LIST
Nous présentons des travaux d'implémentation du chiffrement (fully) homomorphe et de développement d'outils logiciels supports (compilateurs) permettant de faire le lien entre des algorithmes applicatifs et ce formalisme bas-niveau, de manière aussi performante que possible. L'exposé portera également sur les problématiques d'intégration du chiffrement homomorphe dans des cas d'applications[…] -