698 résultats
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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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Analyse statistique des extrêmes pour la modélisation d'évènements rares ou atypiques
Orateur : Gilles Stupfler - ENSAI
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Differentially Private Linear Sketches: Efficient Implementations and Applications
Orateur : Fuheng Zhao (University of California Santa Barbara)
Linear sketches have been widely adopted to process fast data streams, and they can be used to accurately answer frequency estimation, approximate top K items, and summarize data distributions. When data are sensitive, it is desirable to provide privacy guarantees for linear sketches to preserve private information while delivering useful results with theoretical bounds. To address these[…] -
Where ML Security Is Broken and How to Fix It
Orateur : Maura Pintor (PRA Lab, University of Cagliari)
To understand the sensitivity under attacks and to develop defense mechanisms, machine-learning model designers craft worst-case adversarial perturbations with gradient-descent optimization algorithms against the model under evaluation. However, many of the proposed defenses have been shown to provide a false sense of robustness due to failures of the attacks, rather than actual improvements in[…] -
DroidGuard: A Deep Dive into SafetyNet
Orateur : Romain Thomas (Quarkslab)
SafetyNet is the Android component developed by Google to verify the devices’ integrity. These checks are used by the developers to prevent running applications on devices that would not meet security requirements but it is also used by Google to prevent bots, fraud and abuse.In 2017, Collin Mulliner & John Kozyrakis made one of the first public presentations about SafetyNet and a glimpse into the[…] -
Not so AdHoc testing: formal methods in the standardization of the EDHOC protocol
Orateur : Charlie Jacomme (Inria Paris)
We believe that formal methods in security should be leveraged in all the standardisation’s of security protocols in order to strengthen their guarantees. To be effective, such analyses should be:* maintainable: the security analysis should be performed on every step of the way, i.e. each iteration of the draft;* pessimistic: all possible threat models, notably all sort of compromise should be[…]