If you have some time spare, take a look at the #EU 🇪🇺 #cyber #security standards that are currently in a mature draft state, awaiting feedback until end of February. I have started reading through requirements for bootloaders and operating systems.
All docs here:
https://docbox.etsi.org/CYBER/EUSR/Open
How to provide feedback:
https://docbox.etsi.org/CYBER/EUSR/Open/ETSI_Commenting_Guidelines_for_Open_Consultation_2026-01-14.pdf