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644 results
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Seminar
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SoSysec
Intriguing Properties of Adversarial ML Attacks in the Problem Space
Speaker : 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[…] -
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Seminar
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SoSysec
DroidGuard: A Deep Dive into SafetyNet
Speaker : 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[…] -
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Seminar
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SoSysec
Ransomware Detection Using Markov Chain Models Over File Headers
Speaker : 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[…] -
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Seminar
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SoSysec
Reasoning over leaks of information for Access Control of Databases
Speaker : 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.[…] -
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Seminar
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SoSysec
Les cyberopérations: entre technique et droit international. Attribution, preuve et responsabilité.
Speaker : Anne-Thida Norodom (Professeur de droit public, Université de Paris)
L’objet de cette intervention est de montrer à quel point le juridique est dépendant du technique lorsqu’il s’agit de réguler les cyberopérations. L’approche choisie sera celle du droit international public, c’est-à-dire du droit applicable entre Etats. Alors qu’il existe un consensus au niveau international sur l’applicabilité du droit international dans le domaine numérique, les négociations en[…] -
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Seminar
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SoSysec
On MILP modelisations
Speaker : Christina Boura (UVSQ, CNRS, LMV)
Modelizing a problem using linear constraints and solving it by some Mixed Integer Linear Programming (MILP) solver is a popular approach in many domains of computer science. In this talk we present and compare different new techniques to modelize any subset of {0,1}^n for MILP. We then discuss the efficiency of our models by applying them to the search of differential paths, a classical problem[…] -