Hi, We`re trying to choose the controller for the new product. Could you please list relevant ST Devices which supports Asymmetric Image Authentication

[AM.3]

Our Security requirement is Device with Secure Boot with Image authentication using Public Key / Certificate. But We could not find any st device which supports asymmetric authentication. 

[AAgar.2]

There are multiple MCUs but you need to be more specific.

1) What public key algo are you planning to use, RSA, ECDSA?

2) Any more specifics?

[AM.3]

Both are fine ( RSA / ECDSA ). MCU`s with more than 2 MB of Flash and 1 MB of RAM is preferable. I could not find relevant Security Details in the Controllers reference manual. For example I could not find what kind of Secure Boot mechanism is used in this STM32H750XBH6 controller.

[AAgar.2]

Secure Boot will only verify the signature of the FW image.

For image authentication, you will most likely need a custom bootloader.

Although a custom bootloader is not complicated a custom bootloader with crypto is much more complicated. I would consider the system architecture for this further.

DM me if you want to discuss in detail.

[AM.3]

Thanks for the reply. I was talking about user level firmware only ( For now assume user boot loader ). I want the ROM Boot to verify the User Level Bootloader Signature using Public Key. Could you please specify the ST Controllers which supports this and the relevant documents link