[TF-M] Re: [tf-m_v2.2.2] ROTPK revocation and updates question

Hi.

I hope you are doing well. I haven't received any responses yet.

If possible, could you please share any basic guidelines or documentation references?

Thanks Best Regards Phillip ----- 원본 메시지 ----- 보낸 사람: 김종혁 <phillip3420@adtek.co.kr> 받는 사람: tf-m@lists.trustedfirmware.org 날짜: 2026-10-22 10:12:52 제목: [tf-m_v2.2.2] ROTPK revocation and updates question

Hello.

I'm developing the RSE Firmware based on neoverse rdv3r1 and tf-m version 2.2.2

In TF-M v2.2.2, I found code for ROTPK revocation and updates.  I think this code is intended for scenarios where keys,  such as the private key corresponding to a ROTPK, need to be replaced.

It seems that revoking or updating a ROTPK is authorized by verifying a signature generated with the private key corresponding to that ROTPK. If this understanding is correct,  I would expect an additional authorization step to take place before TF-M processes the request.

For example, if changing ROTPK “A” can be authorized by a signature generated with its corresponding private key, “A_private,” this seems potentially risky from a security perspective.

Am I understanding this correctly, or am I missing something?

If an additional authorization step is expected before the ROTPK revocation or update procedure in TF-M, could you provide an example of what that step would involve?

Thanks Best Regards Phillip