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Re: [dns-privacy] More WGLC reviews for TLS Profiles draft?

Stephane Bortzmeyer <bortzmeyer@nic.fr> Tue, 13 December 2016 08:18 UTC

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Date: Tue, 13 Dec 2016 09:17:54 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: John R Levine <johnl@taugh.com>
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Subject: Re: [dns-privacy] More WGLC reviews for TLS Profiles draft?
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On Sat, Dec 10, 2016 at 04:26:52PM -0500,
 John R Levine <johnl@taugh.com> wrote 
 a message of 30 lines which said:

> I realize that there's a fundamentally intractable problem when the
> info you want to bootstrap your secure DNS channel has to be looked
> up in the DNS [...]  You might consider adding something about the
> info leakage tradeoffs of various bootstrap schemes.  For example,
> if the client knows the name of the cache it wants to use, and
> queries in the clear for SRV, A, and TLSA, those will leak but as
> soon as it connects to port 853 of the cache, anyone sniffing
> traffic will know that's the cache it's using anyway,

This problem exists also for "step 2" (draft-bortzmeyer-dprive-step-2,
section 3.2). If anyone can write nice text about it, it would be
useful.

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