The CROSSCON project has successfully implemented and integrated its five use cases, validating the interoperability and scalability of its open and secure IoT stack. These final demonstrations mark a significant step toward enhancing trust, transparency, and interoperability across heterogeneous connected devices and computing environments. Advancing Security Across IoT Domain Using the project’s results, partners have validated a comprehensive set of security mechanisms across five diverse use cases, showcasing the adaptability of the CROSSCON stack to real-world conditions.