Re: [Ntp] Of Roughtime's algorithm agility, and host attestation

Watson Ladd <watsonbladd@gmail.com> Sat, 27 July 2019 05:58 UTC

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From: Watson Ladd <watsonbladd@gmail.com>
Date: Fri, 26 Jul 2019 22:58:22 -0700
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Cc: Robert Nagy <rob@deepdivenetworking.com>, "Salz, Rich" <rsalz@akamai.com>, Thomas Peterson <nosretep.samoht@gmail.com>, NTP WG <ntp@ietf.org>
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Subject: Re: [Ntp] Of Roughtime's algorithm agility, and host attestation
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On Fri, Jul 26, 2019 at 10:51 PM Patrik Fältström
<paf=40frobbit.se@dmarc.ietf.org>; wrote:
>
> On 27 Jul 2019, at 5:05, Robert Nagy wrote:
>
> > This seems within the use case of the already existing TLSA records in DNS. Unless I missed something.
>
> +1
>
> Don't create anything new.

It seems people are misunderstanding the trust relationship here. The
goal is to have publically observable, auditable performance and
identities tied to that. So it makes very little sense to link these
identities to another naming system, but maybe this is a better idea
then it seems. In particular public keys really shouldn't change: that
could permit the laundering of errors, which we very much don't want.

>
>   Patrik
>
> > Robert Nagy
> > CEO/ Senior Dive Master
> > DeepDive Networking, Inc
> > C: 408.480.5133
> > www.deepdivenetworking.com
> >
> >
> > Sent from my iPhone
> >
> >> On Jul 26, 2019, at 8:20 PM, Salz, Rich <rsalz@akamai.com>; wrote:
> >>
> >>
> >>>   To answer the first point, one suggestion by Erik Klein[0] is to create
> >>    a new DNS RR type that includes the long term certificate of the
> >>    Roughtime server.
> >>
> >> Look at https://tools.ietf.org/html/draft-nygren-httpbis-httpssvc-00 which attempts to provide various useful information. One possibility is a "cert digest" field.  Certs are generally too big for DNS, only keys appear.
> >>
> >> For crypto types, re-use an existing registry and profile it to make things MUST NOT.  There are various options, including TLS, JOSE, etc.
> >>
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