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• • Séminaire

  • SoSysec

  Privacy in The 5G-AKA Authentication Protocol

  • 18 janvier 2019

  • Inria Center of the University of Rennes - - Petri/Turing room

  Orateur : Adrien Koutsos (LSV)

  The 5G mobile communications standards are being finalized, and drafts are now available. This standard describes the 5G-AKA authentication and key exchange protocol. The previous version of AKA (3G and 4G) are well-known for their lack of privacy against an active adversary (e.g. a user can be massively tracked using IMSI-catcher). This new version of AKA tries to offer more privacy, notably[…]

• • Séminaire

  • SoSysec

  Built on sand: on the security of Collaborative Machine Learning

  • 25 mars 2022

  • Inria Center of the University of Rennes - - Petri/Turing room

  Orateur : Dario Pasquini (EPFL)

  This talk is about inaccurate assumptions, unrealistic trust models, and flawed methodologies affecting current collaborative machine learning techniques. In the presentation, we cover different security issues concerning both emerging approaches and well-established solutions in privacy-preserving collaborative machine learning. We start by discussing the inherent insecurity of Split Learning and[…]

• • Séminaire

  • SoSysec

  Intriguing Properties of Adversarial ML Attacks in the Problem Space

  • 19 juin 2020

  • Inria Center of the University of Rennes - - Petri/Turing room

  Orateur : Fabio Pierazzi (King’s College London)

  Recent research efforts on adversarial ML have investigated problem-space attacks, focusing on the generation of real evasive objects in domains where, unlike images, there is no clear inverse mapping to the feature space (e.g., software). However, the design, comparison, and real-world implications of problem-space attacks remain underexplored. In this talk, I will present two major contributions[…]

• • Séminaire

  • SoSysec

  Ransomware Detection Using Markov Chain Models Over File Headers

  • 26 novembre 2021

  • Inria Center of the University of Rennes - - Petri/Turing room

  Orateur : David Lubicz (DGA-MI)

  In this paper, a new approach for the detection of ransomware based on the runtime analysis of their behaviour is presented. The main idea is to get samples by using a mini-filter to intercept write requests, then decide if a sample corresponds to a benign or a malicious write request. To do so, in a learning phase, statistical models of structured file headers are built using Markov chains. Then[…]

• • Séminaire

  • SoSysec

  DroidGuard: A Deep Dive into SafetyNet

  • 06 janvier 2023

  • Inria Center of the University of Rennes - - Petri/Turing room

  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[…]

• • Séminaire

  • SoSysec

  Reasoning over leaks of information for Access Control of Databases

  • 13 octobre 2022

  • Inria Center of the University of Rennes - - Petri/Turing room

  Orateur : Pierre Bourhis (CNRS, CRISTAL)

  Controlling the access of data in Database management systems is a classical problem and it has been solved through different mechanisms. One of the most common mechanism implemented in most Database management systems is the mechanism of views, i.e defining the accessible data of a user as the result of a query. This mechanism is also used in principle in other systems such as in social networks.[…]