This international challenge invites students to contribute to the design and testing of a Digital Key system that enables smart, secure vehicle access using wireless technologies. Proposed by ACTIA, an international company with strong ties to universities and engineering schools, the challenge reflects real-world project workflows and offers a valuable entry point into the mobility sector.

The challenge is divided into two main assignments, each focused on a different wireless technology:

Assignment 1 – BLE Subsystem
Students will develop a Bluetooth Low Energy (BLE)-based subsystem that detects and connects to nearby authorized devices, such as smartphones or smartwatches. When a moving object (BLE source) is detected and validated using a whitelist, a secure connection is established. The system then estimates proximity based on predefined zones around the vehicle (e.g., front, rear, left, right). Once the user is close enough, the system hands over to the UWB subsystem for more precise tracking.

Assignment 2 – UWB Subsystem
The second assignment involves developing a UWB-based positioning system that activates after BLE handover. UWB allows for high-precision real-time tracking and can determine whether a user is inside or outside the vehicle. Students will build upon results from a previous CDIO collaboration, which identified key areas for improvement: system robustness, real-time operation, and vehicle-level integration.

Real-World Application
Throughout the project, students will test their subsystems using real hardware (development kits provided by ACTIA) and evaluate their performance in both lab and real-world environments. Security, especially in the context of post-quantum threats, is a critical consideration.

Although the two sub-projects are technically independent, the final objective is to deliver a coherent, integrated system. Teams will need to coordinate at key milestones to ensure their components work together.

Why It Matters
Wireless access and positioning systems are rapidly evolving across the automotive industry and beyond. Understanding their technical, security, and usability dimensions is crucial for engineers working in connected and autonomous vehicles, smart cities, or the Internet of Things (IoT). This challenge provides direct experience with these technologies while simulating how cross-functional teams operate in international, industry-driven contexts.

Student Benefits
Participants will develop technical skills in wireless communication, embedded systems, real-time algorithms, and system integration. They will also gain experience in project management, teamwork, and intercultural collaboration. The challenge includes industry feedback and offers visibility with potential employers—making it not only a rich learning opportunity but also a professional springboard into the industry.