A Multimodal Threat Detection Algorithm for Wide Area Network Security Based on Support Vector Machines

Wide area networks (WANs) are increasingly susceptible to sophisticated cyber threats, particularly as critical infrastructure becomes more interconnected. For example, computing-first networks (CFNs) often traverse WANs at edge access nodes, making them more vulnerable to security threats. This paper proposes a multimodal threat detection framework that combines traffic statistics, system logs, and user behavior patterns to deliver interpretable and real-time classification of network threats. The system applies feature normalization and uses principal component analysis (PCA) to reduce dimensionality. A support vector machine (SVM) with a radial basis function kernel is then used to detect non-linear attack patterns. A web-based architecture enables real-time deployment via REST APIs, and extensive evaluations on the CICIDS 2017 and UNSW-NB15 datasets demonstrate high accuracy (up to 96.8%) and low-latency inference. Ablation studies confirm the importance of multimodal fusion, and benchmark tests validate scalability and system responsiveness. This work offers a deployable and efficient solution for real-time WAN security, with promising applications in energy systems, public infrastructure, and enterprise networks.