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17-21 juin 2024 Anglet (France)
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Ecole d'été L'école d'été aura lieu à Atlanthal, un hôtel situé à Anglet, près de Biarritz. Du 17 au 21 juin 2024, nous vous accueillerons pour la première école d'été du projet PQ-TLS. Prix de l'école : 600 euros TTC (pension complète) Les présentations se dérouleront en anglais. Pour toute information complémentaire, veuillez contacter : marilou.gaborel@irisa.fr Description du projet Le célèbre « cadenas » qui apparaît dans la barre des navigateurs web quand on visite des sites dont l’adresse est précédée de « https » repose sur des primitives cryptographiques qui ne résisteraient pas à un ordinateur quantique. Ce projet intégré se donne pour objectif de développer en 5 ans des primitives post-quantiques dans un prototype de « cadenas post-quantique » qui sera implémenté dans un navigateur open source. L’évolution des standards cryptographiques a déjà débuté, le choix de nouvelles primitives va être fait rapidement, et la transition se fera dans les quelques prochaines années. L’objectif est de jouer un rôle moteur dans cette évolution et de faire en sorte que les acteurs français de la cryptographie post-quantique, déjà fortement impliqués, soient en mesure de peser sur les standards cryptographiques des décennies à venir. Présentations Alice Pellet--Mary - CNRS - Institut de Mathématique de Bordeaux https://apelletm.pages.math.cnrs.fr/page-perso/ Title : Introduction to lattice-based cryptography Abstract: These two talks will give an introduction to some topics about lattice-based cryptography. We will review some basic results about lattices, and see how they can be used to construct encryption schemes and signature schemes. We will also discuss about cryptographic lattice problems, such as LWE and NTRU. Finally, we will mention some NIST candidates, such as Kyber and Falcon.
Charlie Jacomme - Inria Nancy Title: Formal verification of cryptographuc protocols - how it works, what does formal guarantees even mean and why do we want that ? Abstract: In this presentation, we will present why and how we try to increase our confidence in the security of cryptographic protocols by using formal methods, and notably using computer-aided verification. We will give a broad understanding of the main ideas behind verification tools such as CryptoVerif, ProVerif, Squirrel and Tamarin, notably touching on the challenges posed for them by the post-quantum setting. Finally, we will give a concrete example with a case study of the recently deployed PQXDH, a post-quantum variant of the initial key-exchange for the Signal Messenger application.
Matthieu Rivain - Cryptoexperts (https://www.cryptoexperts.com/) https://www.matthieurivain.com/ Title: Zero-Knowledge Proofs & Post-Quantum Signatures from MPC in the Head Abstract: The MPC-in-the-Head (MPCitH) paradigm builds zero-knowledge proofs from multi-party computation (MPC) protocols. MPCitH techniques are especially effective for small circuits such as those arising in (post-quantum) signature schemes. This was first demonstrated by the Picnic signature scheme, submitted to the NIST PQC process in 2017. In the recent NIST call for additional post-quantum signatures, 9 candidates out of the 40 selected for the first round rely on MPCitH techniques. This two-part presentation aims to provide a comprehensive introduction to the MPC-in the-Head paradigm, highlight recent advances in the field, and explore some specific post-quantum signature constructions.
Brice Minaud - Inria - ENS Paris https://www.di.ens.fr/brice.minaud/ Title: Multivariate cryptography Abstract: Multivariate cryptography is a technique to build post-quantum cryptography. It has received less attention than other major approaches, but paradoxically, it also has the highest number of submissions to the NIST standardization process for additional post-quantum signatures (according to the NIST's classification). This calls for additional research. In this presentation, I will endeavor to present multivariate cryptography, including constructions, reductions, attacks, and open problems.
Loïc Masure - CNRS - LIRMM https://www.linkedin.com/in/loicmasure/ Title: Side-channel Analysis of cryptographic implementations : evaluation and counter-measures Abstract: Since the seminal works of Paul Kocher in the late 90s, implementations of cryptographic primitives are known to be the attack vector providing perhaps the most efficient way to break an implementation. In a nutshell, it consists in leveraging some physical measurements of the device running the implementation. Through a divide-and-conquer approach, side-channel analysis often makes the attack complexity linear with the key size. That is why it is crucial to take this threat into account in the design and the implementation of (post-quantum) cryptography. The goal of this presentation is to raise awareness of cryptographers on side-channel analysis, and to provide them some tools to evaluate and mitigate this threat. To this end, we will successively play the role of a malicious adversary, a security evaluator, and a cryptographic designer.
Nicolas Sendrier - Inria Paris https://www.rocq.inria.fr/secret/Nicolas.Sendrier/index.php
Abstract: Coming soon
Xavier Bonnetain - Inria Paris https://who.rocq.inria.fr/Xavier.Bonnetain/ Title; Quantum computing & cryptanalysis
Luca De Feo Title: Isogeny-based Cryptography Abstract: This lecture will review the different families of isogeny-based schemes, explain the recent progress, and give context on the ongoing standardization efforts.
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