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Re: [TLS] Encryption of TLS 1.3 content type

Stephen Farrell <stephen.farrell@cs.tcd.ie> Mon, 28 July 2014 15:57 UTC

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Date: Mon, 28 Jul 2014 16:57:08 +0100
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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References: <DD255E31-FA87-40CE-AF13-0F43A7DD54CF@cisco.com> <CACsn0cnt-ry182AjOyTTZGteifs7VyRPYHaj-xDCBOf0D53w9A@mail.gmail.com> <CAAF6GDfK7awipoMT_PPyKnTe-fF1=KY1Be8kUMSYrXN0Wzb=tg@mail.gmail.com> <1406537753.2413.12.camel@dhcp-2-127.brq.redhat.com> <CAAF6GDcKqymNMnVa50Q7kSTgHrWcM1-qMNGyxU-NcjXMnCD3gQ@mail.gmail.com> <1406560456.7750.20.camel@dhcp-2-127.brq.redhat.com> <20140728152526.GY15044@mournblade.imrryr.org>
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Subject: Re: [TLS] Encryption of TLS 1.3 content type
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I don't have a strong opinion on the topic in the subject line but...

On 28/07/14 16:25, Viktor Dukhovni wrote:
> Defending against traffic analysis is very difficult, and I don't
> think that TLS can (or should attempt to) do the job.

While traffic analysis mitigation is definitely hard and we probably
do not yet have enough expertise in that space, I do think we should
be trying to do as much as we can that might enable such mitigations
as we learn more about 'em. In other words, I think we should be
leaving extension points where we can that'd allow for traffic
analysis mitigations to be defined later (or by implementers). That
said, I'm not sure if this is useful enough in that respect or not.

Cheers,
S.

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