2025-07-08 2:52 AM
I am working on STM32 Trusted Package Creator. I read the artical How to deploy SSP using a step-by-step approach at section "3.1.2.2. Secret file content for STM32MP2 series". I need to create a secret file that contain FIP-EDMK OTP as the image below:
Could you please explain on Enc/Wrap box.
For the FIP-EDMK What should I select?
2025-07-08 5:58 AM
Hello @ThinhNguyen,
According to the Reference Manual, if you choose wrapping, the software using the key must perform steps 2 and 3 (step 1 is handled by the SSP).
Here’s a screenshot from the Reference Manual showing the additional details for wrapping keys.
Since your binary size is 32 bytes (256 bits), you can use either Wrapping or Encryption. It’s best to choose Encryption to avoid additional steps.