Re: [TLS] Banning implicit CIDs in DTLS

Christopher Wood <caw@heapingbits.net> Fri, 22 May 2020 00:09 UTC

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Date: Thu, 21 May 2020 17:09:00 -0700
From: "Christopher Wood" <caw@heapingbits.net>
To: "Thomas Fossati" <Thomas.Fossati@arm.com>, "TLS@ietf.org" <TLS@ietf.org>
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Subject: Re: [TLS] Banning implicit CIDs in DTLS
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On Thu, May 21, 2020, at 9:22 AM, Thomas Fossati wrote:
> Hi Chris,
> 
> On 21/05/2020, 17:00, "Christopher Wood" <caw@heapingbits.net> wrote:
> > *One proposal to address this is by extending the AAD to include the
> > pseudo-header. However, the chairs feel this is an unnecessary
> > divergence from QUIC.
> 
> I don't understand the "unnecessary" in the above para, i.e., why are we
> so tied to QUIC in this case?  I'm asking because it looks like this was
> a core criterion in the Chairs' proposal.

Sorry for the confusion! The point here was that QUIC authenticates what's on the wire, which we felt was important. I should have spelled that out. There are of course other things to consider, as Martin points out.

Best,
Chris