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
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Oblivious Transfer from Zero-Knowledge Proofs (or how to achieve round-optimal quantum Oblivious Transfer without structure)
Speaker : Léo Colisson - Université Grenoble Alpes
We provide a generic construction to turn any classical Zero-Knowledge (ZK) protocol into a composable oblivious transfer (OT) protocol (the protocol itself involving quantum interactions), mostly lifting the round-complexity properties and security guarantees (plain-model/statistical security/unstructured functions…) of the ZK protocol to the resulting OT protocol. Such a construction is unlikely[…]-
Cryptography
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