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729 résultats
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Séminaire
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Cryptographie
Improved Veron Identification and Signature Schemes in the Rank Metric
Orateur : Florian Caullery - Darkmatter
Abstract—It is notably challenging to design an efficient and secure signature scheme based on error-correcting codes. An approach to build such signature schemes is to derive it from an identification protocol through the Fiat-Shamir transform.<br/> All such protocols based on codes must be run several rounds, since each run of the protocol allows a cheating probability of either 2/3 or 1/2. The[…] -
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Séminaire
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Cryptographie
Towards Non-Interactive Zero-Knowledge from CDH and LWE
Orateur : Geoffroy Couteau - Karlsruher Institut für Technologie (KIT)
We provide a generic construction of non-interactive zero-knowledge (NIZK) schemes. Our construction is a refinement of Dwork and Naor’s (FOCS 2000) implementation of the hidden bits model using verifiable pseudorandom generators (VPRGs). Our refinement simplifies their construction and relaxes the necessary assumptions considerably. As a result of this conceptual improvement, we obtain[…] -
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Séminaire
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Cryptographie
Lossy trapdoor primitives, zero-knowledge proofs and applications
Orateur : Chen Qian - soutenance de thèse salle Métivier à l'IRISA, 14h
In this thesis, we study two differentprimitives. Lossy trapdoor functions and zero-knwoledge proof systems.The lossy trapdoor functions (LTFs) arefunction families in which injective functionsand lossy ones are computationally indistin-guishable. Since their introduction, they havebeen found useful in constructing various cryp-tographic primitives. We give in this thesisefficient constructions of[…] -
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Séminaire
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Cryptographie
Toutes les informations ici https://cca.inria.fr/
Orateur : Ilaria Chillotti, Ayoub Otmani, Ida Tucker et Brice Minaud - Séminaire C2
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Séminaire
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Cryptographie
A Modular Security Analysis of EAP and IEEE 802.11
Orateur : Haakon Jacobsen - TBD
The Extensible Authentication Protocol (EAP) is a widely used three-party authentication framework that allows a client to connect to a wireless access point it does not share a secret with, using a mutually trusted server. EAP is often found in enterprise networks or large organizations to provide central key-management and user authentication; one prime example being the eduroam network.<br/> In[…] -
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Séminaire
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Cryptographie
Short McEliece key from algebraic geometry codes with automorphism
Orateur : elise barelli - INRIA Saclay
In 1978, McEliece introduced a public key encryption scheme based on linear codes and suggested to use classical Goppa codes, ie: subfield subcodes of algebraic geometric (AG) codes built on a curve of genus 0. This proposition remains secure and in order to have a generalization of classical Goppa codes, in 1996, H. Janwa and O. Moreno suggested to use subfield subcode of AG codes, which we call[…] -