Shield-IoT is an IoT/IIoT security platform designed for connected transportation fleets and other mass-scale IoT network environments. It monitors device-to-cloud traffic statistics by mirroring (out-of-band) network traffic, meaning it operates without requiring changes to existing network infrastructure or devices. The platform provides real-time visibility into IoT/IIoT assets, network behavior, operational insights, and usage trends. It uses AI-based technology (referred to as coreset-AI) to detect signs of unknown cyber threats such as device takeover, man-in-the-middle attacks, and unknown malware before damage occurs. Detected security events and operational anomalies are surfaced through a multi-tenant user interface and can be accessed by third-party systems via API. The solution is delivered as a SaaS/cloud offering, described as deployable within one day with no impact to existing device operation or services. Shield-IoT also addresses security and privacy compliance by providing automated reporting that combines continuous IoT network monitoring with threat mitigation actions. The platform is designed to scale to millions of devices and is positioned for use across various industry verticals, including connected transportation.