Re: [PATCH v3 4/4] platform/x86: intel_tdx_attest: Add TDX Guest attestation interface driver

Kai Huang
2022-04-19T22:22:09Z

On Tue, 2022-04-19 at 07:13 -0700, Dave Hansen wrote:
> On 4/19/22 00:47, Kai Huang wrote:
> > > From security's perspective, attestation is an essential part of TDX. That
> > being said, w/o attestation support in TD guest, I guess nobody will seriously
> > use TD guest.
>
> Are you saying you can't think of a single threat model where there's a
> benefit to running a TDX guest without attestation? Will TDX only be
> used in environments where secrets are provisioned to guests on the
> basis of attestation?
>
> >

I don't think anyone should provision secret to a TD before it get attested that
it is a genuine TD that he/she expected. If someone does that, he/she takes the
risk of losing the secret. Of course if someone just want to try a TD then w/o
attestation is totally fine.

--
Thanks,
-Kai