The hardware unique key (HUK) is a symmetric encryption key stored in the OTP bits of the platform. The HUK is used as a derivative for other keys. This means you can use the same keys for encryption purposes and know that the keys cannot be used to access data on a different device, even if they are leaked.
| On the STM32MP15, STMicroelectronics does not pre-provision a HUK. It is your responsibility to provision a HUK on every device. |
Refer to Provision and lock the HUK.
