pr\u00e9sentent<\/p>\n\n\n\n
Autoris\u00e9 \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en :<\/p>\n\n\n\n
le JEUDI 13 NOVEMBRE 2025 \u00e0 15h00<\/p>\n\n\n\n
\u00e0<\/p>\n\n\n\n
Amphi 33\/34 https:\/\/us06web.zoom.us\/j\/88298996327?pwd=kaF2A8m5xCu5zSB5CaMHIz2RpU3BX5.1<\/a> Membres du jury :<\/strong><\/p>\n\n\n\n M. Yvon KERMARREC<\/strong>, Professeur, IMT Atlantique, FRANCE – Rapporteur M. Joaquin GARCIA-ALFARO<\/strong>, Professeur, T\u00e9l\u00e9com SudParis, FRANCE – Directeur de th\u00e8se<\/p>\n\n\n\n Invit\u00e9s :<\/strong><\/p>\n\n\n\n M. Reda Yaich<\/strong>, Responsable d\u2019\u00e9quipe R&T \u00ab Cybers\u00e9curit\u00e9 \u00bb , IRT SystemX, FRANCE – Encadrant de th\u00e8se<\/p>\n\n\n\n M. Michel Barbeau<\/strong>, Professeur, Universit\u00e9 Carleton, Ottawa, CANADA – Co-encadrant de th\u00e8se<\/p>\n\n\n\n R\u00e9sum\u00e9 :<\/strong><\/p>\n\n\n\n De nos jours, les infrastructures critiques telles que les centrales nucl\u00e9aires, les stations de distribution \u00e9lectrique, les stations p\u00e9troli\u00e8res, les r\u00e9seaux de chemin de fer, etc., deviennent de plus en plus connect\u00e9es. De ce fait, ces infrastructures, qui appartiennent \u00e0 la famille des syst\u00e8mes cyber-physiques, sont de plus en plus expos\u00e9es, et sujettes aux cyber-attaques. Leur appellation d\u2019 \u00ab infrastructure critique \u00bb vient du fait que ces syst\u00e8mes remplissent des missions vitales. En cas d\u2019attaque ou, plus g\u00e9n\u00e9ralement, de perturbation de leurs missions, de graves dommages peuvent \u00eatre caus\u00e9s et notamment sur les vies humaines. Un syst\u00e8me cyber-physique est un syst\u00e8me qui communique avec le monde physique et virtuel. De ce fait, il poss\u00e8de des \u00e9l\u00e9ments mat\u00e9riels et logiciels, et son fonctionnement est r\u00e9gi par un contr\u00f4leur. La r\u00e9silience des syst\u00e8mes cyber-physiques est un aspect fondamental de la cyber-s\u00e9curit\u00e9 \u00e0 prendre en compte pour la protection des infrastructures critiques. Des attaques perp\u00e9tr\u00e9es \u00e0 l\u2019encontre de ces infrastructures critiques, peuvent conduire \u00e0 d\u2019importantes pertes. Il est donc vital de les prot\u00e9ger des attaques cyber, ou bien d\u2019\u00e9v\u00e8nements adverses de mani\u00e8re g\u00e9n\u00e9rale, tels que des d\u00e9sastres naturels, etc. La cyber-r\u00e9silience fait r\u00e9f\u00e9rence \u00e0 la capacit\u00e9 d\u2019un syst\u00e8me \u00e0 r\u00e9sister, \u00e0 absorber des attaques, et \u00e0 apprendre des \u00e9v\u00e8nements, et cela afin de continuer \u00e0 fournir un certain niveau de service, m\u00eame en pr\u00e9sence d\u2019attaques. La r\u00e9silience appliqu\u00e9e aux syst\u00e8mes cyber-physiques poss\u00e8de un double int\u00e9r\u00eat : – Am\u00e9liorer l\u2019architecture des syst\u00e8mes existants afin d\u2019augmenter leur r\u00e9silience, – Accompagner les acteurs du secteur industriel d\u00e8s la phase de conception de nouveaux syst\u00e8mes, afin de les cr\u00e9er r\u00e9silients par conception. Des m\u00e9triques, ainsi que des contremesures doivent donc \u00eatre \u00e9tablies afin de quantifier et am\u00e9liorer la r\u00e9silience des infrastructures critiques. Cependant, il est difficile de construire des m\u00e9triques pr\u00e9cises d\u2019\u00e9valuation de la r\u00e9silience. En effet, les infrastructures critiques sont des syst\u00e8mes complexes et leur mod\u00e9lisation requiert un certain niveau d\u2019abstraction, et celle-ci impacte la pr\u00e9cision des m\u00e9triques \u00e9tablies. The protection of complex systems is an issue of paramount importance, whether it is related to the security of a country facing climate change or disinformation campaigns that aim to destabilize national cohesion, or the security of critical infrastructures facing adversarial events. We live in a digitization era that implies an increase in competitiveness. Today’s systems must remain secured, reliable and must allow decentralized collaboration. Critical infrastructures and, in a more general way, Cyber-Physical Systems (CPSs), become highly connected and thus, exposed to cyber attacks. This is especially true for maritime ports infrastructures which involve many critical systems such as electrical distribution systems, water treatment systems, autonomous transportation, etc. Water treatment systems are good candidates to illustrate the criticality of a mission. Indeed, Critical Infrastructures are called critical because a disruption of their mission could generate severe consequences, especially for human beings. The resilience of CPSs is a fundamental aspect of cyber security that must be taken into account when protecting critical infrastructures. Attacks on critical infrastructures can lead to significant losses. It is therefore vital to protect them from cyber attacks, or from adverse events such as natural disasters. The cyber resilience notion refers to a system’s ability to resist, absorb attacks, and learn from these adversarial events, in order to continue to provide a certain level of service, even if an attack occurs. Resilience applied to CPSs has a twofold interest: – Improving the architecture of existing systems to increase their resilience; – Help designing new architectures to make them resilient by design. Metrics and countermeasures need to be established to quantify and improve the resilience of Critical Infrastructures. However, it is difficult to build accurate metrics to assess resilience. Indeed, Critical Infrastructures are complex systems and their modeling requires a certain level of abstraction, which impacts the accuracy of the established metrics. Through this thesis, we consider the Secure Water Treatment System (SWaT) as a use case. The purpose of this thesis is to present a methodology to assess the resilience capacities of complex systems and to provide appropriate countermeasures.<\/p>\n","protected":false},"excerpt":{"rendered":" L’Ecole doctorale : Ecole Doctorale de l’Institut Polytechnique de Paris et le Laboratoire de recherche SAMOVAR – Services r\u00e9partis, Architectures, Mod\u00e9lisation, Validation, Administration des R\u00e9seaux pr\u00e9sentent l\u2019AVIS DE SOUTENANCE de Monsieur Romain DAGNAS Autoris\u00e9 \u00e0 pr\u00e9senter ses travaux en vue de l\u2019obtention du Doctorat de l’Institut Polytechnique de Paris, pr\u00e9par\u00e9 \u00e0 T\u00e9l\u00e9com SudParis en : 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2 Boulevard Thomas Gobert, Site Nano-INNOV, Bat 862 91120 PALAISEAU
Inscription obligatoire au plus tard le 10\/11\/2025 au soir sur https:\/\/www.irt-systemx.fr\/evenements\/soutenance-de-these-de-romain-dagnas\/<\/a>
Lien Visioconf\u00e9rence <\/p>\n\n\n\n
Meeting ID: 882 9899 6327<\/a>
Passcode: 6qXK1d<\/p>\n\n\n\n
M. Mohamed MOSBAH<\/strong>, Professeur, Bordeaux INP, FRANCE – Rapporteur
M. Rob KOOIJ<\/strong>, Professor, Delft University of Technology, PAYS-BAS – Examinateur
Mme Maria POTOP-BUTUCARU<\/strong>, Professeure, Sorbonne Universit\u00e9, FRANCE – Examinateur<\/p>\n\n\n\n\u00ab Quantification et Am\u00e9lioration de la Cyber-R\u00e9silience des Syst\u00e8mes Complexes \u00bb<\/h2>\n\n\n\n
pr\u00e9sent\u00e9 par Monsieur Romain DAGNAS<\/h2>\n\n\n\n
Abstract :<\/strong><\/p>\n\n\n\n