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Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31

Stephen Farrell <stephen.farrell@cs.tcd.ie> Mon, 15 April 2019 13:25 UTC

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Cc: "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "dots@ietf.org" <dots@ietf.org>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Mon, 15 Apr 2019 14:25:43 +0100
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Subject: Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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Hiya,

On 15/04/2019 14:16, mohamed.boucadair@orange.com wrote:
>> - p13: The cuid still seems to me to be too static (there's a
>
> [Med] This is a feature not a bug. This scheme is particularly useful
> to recover state, for example, upon reboot or crash of a DOTS client.
> 

Well, fair enough, but FWIW I'm not convinced that a
client that can keep state (the private key and other
dots stuff) couldn't also as easily keep a cuid value.
And ISTM there should also be equally good ways to
recommend for generating a cuid that don't have that
1:1 mapping to a key pair. All that said, it's not me
needs to be convinced, but the IESG, so probably best
to wait and see if they think this is worth changing
or not before doing so.

S.

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