TF-M vs TF-A — When Do You Reach For Which?
TF-M lives on Cortex-M with SAU and NSC veneers. TF-A lives on Cortex-A with EL3 and BL1/BL2/BL31. Pick by the silicon, not by preference.
Embedded Security
Do I Need a Secure Element If My MCU Has a Crypto Accelerator?
Why a hardware accelerator and a secure element aren’t substitutes for each other, when one is enough, and when you actually want both.
What TrustZone-M Adds to Your Build
A walk through what TrustZone-M adds to a build: two projects, two memory maps, SAU configuration, the veneer region, and signed images. None of it is gratuitous.