Description
Cet exposé est basé sur des travaux communs avec Hervé Chabanne, David Pointcheval, Qiang Tang menés dans le cadre du projet ANR RNRT BACH (Biometric Authentication with Cryptographic Handling).<br/> Extended Private Information Retrieval (EPIR) is a generalization of the notion of Private Information Retrieval (PIR). The principle is to enable a user to privately evaluate a fixed and public function with two inputs, a chosen block from a database and an additional string. In this talk, we will present this notion and describe 2 constructions with applications to biometric authentication. We will then explain an extension of this notion in order to add more flexibility during the system life. As an example, we will introduce a general protocol enabling polynomial evaluations. As to practical concern, we will also discuss how amortizing database computations when dealing with several requests.
Next sessions
-
Polytopes in the Fiat-Shamir with Aborts Paradigm
Speaker : Hugo Beguinet - ENS Paris / Thales
The Fiat-Shamir with Aborts paradigm (FSwA) uses rejection sampling to remove a secret’s dependency on a given source distribution. Recent results revealed that unlike the uniform distribution in the hypercube, both the continuous Gaussian and the uniform distribution within the hypersphere minimise the rejection rate and the size of the proof of knowledge. However, in practice both these[…]-
Cryptography
-
Asymmetric primitive
-
Mode and protocol
-
-
Post-quantum Group-based Cryptography
Speaker : Delaram Kahrobaei - The City University of New York