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Dans le cadre des Inforums et des séminaires CyberExcellence, nous aurons le plaisir d’accueillir le Dr. Ryan Wails (Georgetown University), qui nous parlera de cyber-sécurité. Vous trouverez l’abstract de sa présentation ainsi que sa bio ci-dessous.Pas d'inscription nécessaire.Nous espérons vous retrouver nombreux·ses à cet événement !On the Interplay of Modern Traffic Analysis and Internet Censorship & Circumvention TechniquesIn this talk, I will review the current state of real-world Internet censorship and some tools that network users employ to circumvent censorship. Then, I'll take a prospective view about how censors might incorporate modern ML-based traffic analysis techniques to block users, motivating the need for stronger circumvention tools. Finally, I'll discuss our new internet censorship evasion technique called Unidentified Protocol Generation (published at USENIX Security 2025, which is able to evade detection by state-of-the-art traffic analysis.Author bio: Ryan Wails is a Postdoc a Georgetown University researching network privacy and security. He has been doing his PhD while working at the US Naval Research Laboratory. This lab is known for originating the Tor network, and creating the PETs research community which is now among the top international research communities in computer security. Ryan is a core contributor of the Tor project and has published in top conferences on Networking simulators, privacy attacks, privacy-preserving measurements, path selection algorithms, censorship circumvention, and website fingerprinting. He received several international disctinctions, including Best papers in top conferences and award recognitions at community events for his contributions.

Le 13 mai dernier se tenaient les présentations des projets de génie logiciel (projet MDL de son petit nom) devant le jury composé des coachs et des clients externes venus pour l’occasion. À travers les 7 projets présentés cette année, les étudiants ont pu montrer leurs réalisations, mais aussi expliquer comment ils ont interagi avec leurs clients pour mener à bien leurs développements.

JuryProf. Max COLLINET (UNamur), présidentProf. Johan YANS (UNamur), secrétaireProf. Flavien CHOULET (Université Marie et Louis Pasteur)Dr Alexandre FELTEN (UNamur)Prof. Mohammed BOUABDELLAH (Université Mohammed IV Polytechnique)Prof. Nadine MATTIELLI (Université libre de Bruxelles)Dr Augustin DEKONINCK (UMons)RésuméSupergene processes are responsible for the redistribution of metals near the surface and can form economically significant mineral deposits. This PhD thesis investigates the evolution (genesis and timing) of supergene mineralization in polymetallic systems from Morocco (Anti-Atlas and Atlas) and France (Provence). The study combines field observations, petrography, geochemistry, stable isotopes analyses and experimental oxidation to provide a multiscale understanding from microscopic characterization to the regional geological evolution.Stable Cu and Fe isotopes show singular fractionation in each deposit, which primarily depends on the primary ore isotopic composition. In addition, specific minerals (i.e., arsenates) may strongly impact Cu fractionation of later formed minerals (i.e., malachite), which can lead to extremely variable Cu isotope compositions across deposits. Hence, Cu and Fe isotopes must be considered as site specific. Experimental investigations complete geological data by quantifying oxidation rates of pyrite and galena under various conditions. These results highlight that the timing of weathering is reproductible and fit with natural examples studied in this thesis via (U–Th)/He and K–Ar geochronology. However, pyrite oxidation (4.3 µm/year) is faster than galena, which may have a catalytic effect  on other sulfides in polymetallic deposits.Overall, supergene mineralization reflects combined controls from mineralogy, host rocks, fluids, climate and tectonics. This work refines genetic models and provides new tools to describe and constrain secondary mineralization, and their potential impact on metallurgical processes.