In the realm of electronics manufacturing, ensuring robust cyber security is paramount. This presentation will delve into the critical challenge of provisioning cryptographic material and securely inserting it into Electronic Control Units (ECUs), with a specific focus on the security features of the microcontrollers used within these units. We will explore the intricacies of implementing secure processes such as secure boot, key injection, key catalog management, HSM activation and updates, and device lock and protection with passwords. Emphasizing the importance of collaboration across teams, we will also reference the ISO/SAE 21434 standard to highlight best practices and innovative solutions that enhance the security capabilities of microcontrollers, ultimately safeguarding against potential cyber threats