topic Re: Query about the difference between HSM and HSE in S32G

Query about the difference between HSM and HSE

TJL — Wed, 13 Nov 2024 05:39:10 GMT

Hello.

I wonder what the difference is between HSM and HSE?

I found HSM is used for S32KX, but HSE is used for S32GX.

But I don't know what the difference is exactly.

Thank.

TJL

chenyin_h — Wed, 13 Nov 2024 11:01:22 GMT

Hello, @TJL

Thanks for your post

HSM is usually mentioned on i.MX/layerscape products from NXP, which means Hardware Security Module, from my view:

The hardware security module on S32G is called HSE_H, while on S32K3xx is called HSE_B (Base).

I am not very sure of the status on S32K1xx, for details on such products, I suggest asking it in the corresponding board.

Chenyin

TJL — Wed, 13 Nov 2024 23:51:35 GMT

Thanks for your reply.

I knew HSM is Hardware Secure Module and HSE is Hardware Secure Engine.

But I don't know what the difference is between HSM and HSE.

It seems like the features are alike.

I wonder if it just has a difference in name.

Thanks.

Jun

chenyin_h — Thu, 14 Nov 2024 02:45:01 GMT

Hello, @TJL

Thanks for your reply.

From my understanding.

HSM seems be the common name of such security engine/security module that existed in SOC.

For the IP name(specific name of each SOC), they would be different. I suggest reading the RM of different SOC for accurate expression.

For example, in S32K3: it is called HSE_B

In S32G: it is called HSE, or more clear, HSE_H

On i.MX8 and Layerscape1/2, it is called CAAM

I am not very familiar with other platforms, but I know there are other names like ESE, etc.

Chenyin