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665 résultats
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Séminaire
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Cryptographie
Generic Attack on Duplex-Bases AEAD Modes using Random Function Statistics
Orateur : Rachelle Heim Boissier - Inria
Duplex-based authenticated encryption modes with a sufficiently large key length are proven to be secure up to the birthday bound 2^(c/2), where c is the capacity. However this bound is not known to be tight and the complexity of the best known generic attack, which is based on multicollisions, is much larger: it reaches 2^c/α where α represents a small security loss factor. There is thus an[…] -
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Séminaire
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Cryptographie
Generic SCARE: reverse engineering without knowing the algorithm nor the machine
Orateur : Hélène LE BOUDER - IMT Atlantique
A novel side-channel-based reverse engineering technique is introduced, capable of reconstructing a procedure solely from inputs, outputs, and traces of execution. Beyond generic restrictions, no prior knowledge of the procedure or the chip it operates on is assumed. These restrictions confine the analysis to 8-bit RISC constant-time software implementations. Specifically, the feasibility of[…] -
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Séminaire
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Cryptographie
Finding short integer solutions when the modulus is small
Orateur : Eamonn Postlethwaite - King's College London
We present cryptanalysis of the inhomogenous short integer solution (ISIS) problem for anomalously small moduli by exploiting the geometry of BKZ reduced bases of q-ary lattices. We apply this cryptanalysis to examples from the literature where taking such small moduli has been suggested. A recent work [Espitau–Tibouchi–Wallet–Yu, CRYPTO 2022] suggests small versions of the lattice signature[…] -
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Groupe de travail
Modélisation statistique et sécurité des générateurs d'aléa pour la cryptographie
Orateur : David Lubicz - DGA, IRMAR
Dans cet exposé on essaie d'expliquer ce que l'on entend pas méthodes statistiques et on donne des exemples concrets d'application dans la cybersécurité.-
Cryptography
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Groupe de travail
Analyse statistique des extrêmes pour la modélisation d'évènements rares ou atypiques
Orateur : Gilles Stupfler - ENSAI
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Séminaire
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SoSysec
The Internet of Backdoors
Orateur : par Sam L. Thomas (University of Birmingham, UK)
Complex embedded devices are becoming ever prevalent in our everyday lives, yet only a tiny amount of people consider the potential security and privacy implications of attaching such devices to our home, business and government networks. As demonstrated through recent publications from academia and blog posts from numerous industry figures, these devices are plagued by poor design choices[…] -