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

"Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com> Mon, 15 April 2019 14:38 UTC

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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "secdir@ietf.org" <secdir@ietf.org>
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>
Thread-Topic: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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Date: Mon, 15 Apr 2019 14:38:01 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/fNjeNBzVkvFDcuy9IfUnnYGCbd0>
Subject: Re: [secdir] [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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> -----Original Message-----
> From: Dots <dots-bounces@ietf.org>; On Behalf Of Stephen Farrell
> Sent: Monday, April 15, 2019 6:56 PM
> To: mohamed.boucadair@orange.com; secdir@ietf.org
> Cc: draft-ietf-dots-signal-channel.all@ietf.org; ietf@ietf.org; dots@ietf.org
> Subject: Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
> 
> 
> 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.

The advantage of the 1:1 mapping is the DOTS servers can validate the DOTS client is not using the 'cuid' of another client. 

-Tiru

> 
> S.
>