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Re: [dns-privacy] [Ext] TLSA for secure resolver-auth transport (was: Possible use case: Opportunistic encryption for recursive to authoritative)

Paul Hoffman <paul.hoffman@icann.org> Wed, 12 August 2020 20:56 UTC

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From: Paul Hoffman <paul.hoffman@icann.org>
To: Paul Wouters <paul@nohats.ca>
CC: "dprive@ietf.org" <dprive@ietf.org>
Thread-Topic: [Ext] [dns-privacy] TLSA for secure resolver-auth transport (was: Possible use case: Opportunistic encryption for recursive to authoritative)
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Date: Wed, 12 Aug 2020 20:56:48 +0000
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Subject: Re: [dns-privacy] [Ext] TLSA for secure resolver-auth transport (was: Possible use case: Opportunistic encryption for recursive to authoritative)
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On Aug 12, 2020, at 12:50 PM, Paul Wouters <paul@nohats.ca> wrote:
> The "obvious" part only referred to "use DNS records to authenticate
> DNS authoritative servers".

That phrase over-simplified. A more accurate phrasing would be "use a chain of DNS records to authenticate DNS authoritative servers". There are many ways that the chain could break, or might not even exist. The web PKI is full of single-link trust anchors. There are many ways that trusting a single link could be dangerous as well.

Some of us don't find either of those as obvious as you do.

--Paul Hoffman

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