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Deploying Connected and Automated Vehicles (CAVs) on top of 5G and Beyond networks (5GB) makes them vulnerable to increasing vectors of security and privacy attacks. In this context, a wide range of advanced machine/deep learning-based solutions have been designed to accurately detect security attacks. Specifically, supervised learning techniques have been widely applied to train attack detection models. However, the main limitation of such solutions is their inability to detect attacks different from those seen during the training phase, or new attacks, also called zero-day attacks. Moreover, training the detection model requires significant data collection and labeling, which increases the communication overhead, and raises privacy concerns. To address the aforementioned limits, we propose in this paper a novel detection mechanism that leverages the ability of the deep auto-encoder method to detect attacks relying only on the benign network traffic pattern. Using federated learning, the proposed intrusion detection system can be trained with large and diverse benign network traffic, while preserving the CAVs’ privacy, and minimizing the communication overhead. The in-depth experiment on a recent network traffic dataset shows that the proposed system achieved a high detection rate while minimizing the false positive rate, and the detection delay., Le déploiement de véhicules connectés et automatisés (CAV) utilisant les réseaux 5G et 5G-B les rend vulnérables à de nouveaux vecteurs d'attaques. Afin de détecter et de mitiger ces attaques, plusieurs systèmes de détection d'intrusions (IDS) basés sur l'apprentissage automatique ont été proposés, dont la grande majorité utilise l'apprentissage profond supervisé. Cependant, la principale limite de ce type de solution est son incapacité à détecter des attaques différentes de celles vues lors de l'apprentissage de l'IDS, ou de nouvelles attaques, également appelées attaques Zero-day. De plus, l'apprentissage du modèle de détection nécessite une collecte et un étiquetage importants des données, ce qui augmente le coût de communication et soulève des problèmes de confidentialité. Afin de pallier ces problèmes, nous proposons dans cet article un nouveau IDS basé sur l'apprentissage fédéré non supervisé préservant la confidentialité, et dont l'apprentissage du système ne nécessite que le trafic réseau légitime. L'expérimentation de la solution proposée sur un jeu de données récent montre que le système proposé présente un taux de détection élevé tout en minimisant le taux de faux positifs et le délai de détection.

International audience; Collision detection and avoidance between vehicles is one of the key services envisioned in the Internet of Vehicles (IoV). Such services are usually deployed at the Multi-access Edge Computing (MEC) to ensure low latency communication and thus guarantee real-time reactions to avoid collisions between vehicles. In order to maximize the coverage of the road and ensure that all vehicles are connected to an optimal MEC host (in terms of geographical location), the collision avoidance application needs to be instantiated on all the MEC hosts. This may add a burden on the computing resources available at the latter. In this paper, we propose an AI-empowered framework that aims to optimize the computing resources at the MEC hosts. Our framework uses deep learning to (1) predict the vehicle density to be served by a MEC host and (2) derive the exact computing resources required by the collision detection application to run optimally. We evaluate the proposed framework using a real dataset representing vehicle mobility in a big city. Obtained results show the accuracy of our prediction model and hence, the efficiency of our resources assignment framework to exactly deduce the optimal computing resources needed by each instance of the application.