On Wed, Mar 10, 2021 at 11:29 AM Sumit Garg <sumit.garg@xxxxxxxxxx> wrote: > And RPMB key provisioning > being a one time process should be carried out carefully during device > manufacturing only. For a product use case such as a mobile or chromebook or set-top box: yes. In this scenario something like TEE possesses this symmetric key. But for a random laptop with an NVME containing an RPMB it may be something the user want to initialize and use to lock down their machine. The use case for TPM on laptops is similar: it can be used by a provider to lock down a machine, but it can also be used by the random user to store keys. Very few users beside James Bottomley are capable of doing that (I am not) but they exist. https://blog.hansenpartnership.com/using-your-tpm-as-a-secure-key-store/ I think we need to think not only of existing use cases but also possible ones even if there is currently no software for other use cases. (But maybe that is too ambitious.) Yours, Linus Walleij
