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Re: [TLS] Double-Checking after TLS 1.3 pre-RFC copy edits

Eric Rescorla <ekr@rtfm.com> Sun, 29 July 2018 22:29 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Sun, 29 Jul 2018 15:28:48 -0700
Message-ID: <CABcZeBO6L9wy-+EMJ358+Cjxr6VwA2dEZH5LUPTn6TDnXW-j-Q@mail.gmail.com>
To: Ilari Liusvaara <ilariliusvaara@welho.com>
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Subject: Re: [TLS] Double-Checking after TLS 1.3 pre-RFC copy edits
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Thanks!

On Sun, Jul 29, 2018 at 8:10 AM, Ilari Liusvaara <ilariliusvaara@welho.com>
wrote:

> On Sat, Jul 28, 2018 at 06:41:09AM -0700, Eric Rescorla wrote:
> >
> > The text here isn't totally generic, as it refers to scalar
> multiplication
> > and u-coordinate
> > point input. So, if we had some other ECDH-type thing that didn't have
> these
> > concepts, then we would have yet new text.
> >
> > In the interest of the minimal change, I suggest:
> >
> > "For X25519 and X448, the calculations are as follows"
> > ...
> >
> > "For these curves, implementations SHOULD use..."
> >
> > How does that sound?
>
> Yeah, passable.
>
> I do not think it is likely we need to add another DH function (due
> to threat of QC making ((H)EC)DH go away), and even if we do, it is
> just some extra text. The PQC asymmetric key exchanges will be KEMs,
> which have pretty different behavior from existing things.
>
>
>
> -Ilari
>

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