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Encrypt custom OBKey data provisioned with the HUK on the STM32H573

Vishal58
Associate II

‎2025-02-04 05:32 AM

I am looking on how to encrypt my OBKey data using HUK during provisioning.

HUK is device specific then how can we give this HUK Key to Trusted package creator to download the OBKey data?

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STea
ST Employee

‎2025-02-04 07:24 AM

Hello @Vishal58 ,

You can check this knowledge article How to enable RDP-like product state flash protect... - STMicroelectronics Community which will help you with OBkey provisioning steps if you want to use HUK, you could not access HUK directly but Derived key from RHUK can be used to encrypt keys and data see this wiki page which can help you understand this more clearly :Security:Secure Storage for STM32H5 - stm32mcu.
Regards

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