Re: [Din] Fwd: New Version Notification for draft-mayrhofer-did-dns-01.txt

Stephane Bortzmeyer <bortzmeyer@nic.fr> Fri, 15 February 2019 09:37 UTC

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Date: Fri, 15 Feb 2019 10:37:14 +0100
From: Stephane Bortzmeyer <bortzmeyer@nic.fr>
To: Alexander Mayrhofer <alex.mayrhofer.ietf@gmail.com>
Cc: IETF DNSOP WG <dnsop@ietf.org>, din@irtf.org
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Subject: Re: [Din] Fwd: New Version Notification for draft-mayrhofer-did-dns-01.txt
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On Fri, Feb 08, 2019 at 02:58:38PM +0100,
 Alexander Mayrhofer <alex.mayrhofer.ietf@gmail.com> wrote 
 a message of 59 lines which said:

> Feedback highly appreciated,

I think that it is an important work because it brings the power of
the DNS to many other identifier systems. So, I support it.

May be more examples could help people figure out the use cases? "My
Bitcoin address is at foobar.example" and then the Bitcoin software
would query _did.foobar.example and get
<did:bitcoin:1NZc7FJ7eHJgRMRSrmncJJM9bPnusJeuR6>.

I note that there exists already non-standard (and probably not really
deployed) solutions in that space, some specific to a TLD
<https://www.nominet.uk/domain-names-unlock-new-potential-on-blockchain/>
<http://domainincite.com/23273-my-brain-explodes-trying-to-understand-mmxs-new-blockchain-deal-for-luxe>

Regarding draft -01: it seems OK to me. The only problem I find:

> particularly the concerns around downgrade attacks when the record
> is not signed

Why downgrade attacks specifically? Without DNSSEC, a lot of attacks
are possible.