On Mon, Aug 17, 2020, at 3:30 PM, Martin Thomson wrote:
>
>
> On Tue, Aug 18, 2020, at 07:55, Christopher Patton wrote:
> > Hi Martin,
> >
> > > Or maybe just running the HPKE KDF with a fixed input.
> > Do you mean something like this? Let `config_digest = KDF.extract("some
> > salt", "some label", config)`, where `config` is the ECH configuration?
>
> Sure. I would probably use all of HKDF though, see below.
If we're going to use all of HKDF (extract + expand), then let's just use the
HPKE's Extract+Expand functions in sequence.
Best,
Chris
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