Description
Provable security becomes more and more popular in the cryptographic community. As exemplified by the NESSIE project, it is now common to see it as an attribute of a cryptosystem. Provable security is at the protocol level; a harder task may be to evaluate the security of a cryptosystem at the implementation level. Rather than considering a cryptosystem as a black-box, we may assume that some sensitive data can leak during the course of the execution of a (naively implemented) crypto-algorithm. A concrete example is given by the so-called side-channel analysis.<br/> Side-channel analysis is a powerful technique re-discovered by P. Kocher in 1996. The principle consists in monitoring some side-channel information like the running time, the power consumption, or the electromagnetic radiation. Next, from the monitored data, the attacker tries to deduce the inner-workings of the algorithm and thereby to retrieve some secret information. When there is a single measurement, the process is referred to as a simple side-channel analysis; and when there are several measurements handled together with statistical tools, the process is referred to as differential side-channel analysis.<br/> This talk is aimed at studying the resistance of elliptic curve cryptosystems against those two classes of attacks. In particular, we survey the various strategies proposed so far to prevent side-channel attacks.
Prochains exposés
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Adelic reduction of module lattices
Orateur : Henry Bambury - DGA-MI et Inria Rennes
We give a strict generalisation of the LLL algorithm over number fields, based on the reduction theory of $GL(n)$ over the adele ring of a number field. Our algorithm is free of heuristics, with rigorous bounds on output quality and complexity. -- based on joint work with Seungki Kim, Changmin Lee and Phong Nguyen ---
Cryptography
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European Cyber Week: atelier cryptographie post-quantique
Dans la continuité des éditions 2021, 2022 et 2024, la DGA — en partenariat avec CREACH LABS et avec le soutien de l'ANSSI, de l'IRISA, de l'IRMAR et du Pôle d'Excellence Cyber — organise la 4e édition de l'atelier consacré à la cryptographie post-quantique dans le cadre de l'European Cyber Week 2026. Attention, il faut s'inscrire (gratuitement) au préalable — s'inscrire à la conférence Les[…] -
Post-quantum day of the cryptography seminar
A scientific day devoted to post-quantum cryptography, held in the wake of the European Cyber Week, with talks more technical than those presented at the ECW.