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Re: [Lake] proposed scoping text

Göran Selander <goran.selander@ericsson.com> Thu, 09 April 2020 13:56 UTC

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From: Göran Selander <goran.selander@ericsson.com>
To: Eric Rescorla <ekr@rtfm.com>
CC: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "lake@ietf.org" <lake@ietf.org>
Thread-Topic: [Lake] proposed scoping text
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Date: Thu, 09 Apr 2020 13:56:35 +0000
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Subject: Re: [Lake] proposed scoping text
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From: Eric Rescorla <ekr@rtfm.com>
Date: Thursday, 9 April 2020 at 15:17
To: Göran Selander <goran.selander@ericsson.com>
Cc: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "lake@ietf.org" <lake@ietf.org>
Subject: Re: [Lake] proposed scoping text



On Thu, Apr 9, 2020 at 3:09 AM Göran Selander <goran.selander=40ericsson.com@dmarc.ietf.org<mailto:40ericsson.com@dmarc..ietf.org>> wrote:


On 2020-04-08, 17:41, "Lake on behalf of Stephen Farrell" <lake-bounces@ietf.org<mailto:lake-bounces@ietf.org> on behalf of stephen.farrell@cs.tcd.ie<mailto:stephen.farrell@cs.tcd.ie>> wrote:

    Ben's proposal is:

    "
    Strip down the requirements document a lot, to have a
    qualitative sense of "these are the combinations of crypto
    primitives that we consider important *right now*" (e.g.,
    PSK and RPK). Have an acknowledgment that extensibility is
    inevitable, but disclaim that we are focusing on getting it
    right for these narrow cases right now, and if someone
    wants to do a broader case in the future, then more
    analysis will need to be done at that time.

    But for now,
    we focus on getting RPK and PSK into:

     3 flights, 51-byte messages, and do that well.

[GS] Focus on RPK (by value and by reference) and certificate by reference, and do that well. For RPK by reference: 3 flights in (1,1,1) fragments. For RPK by value and certificate by reference the number of fragments should be kept at a minimum.

This seems to put us back in exactly the same situation we were in before Ben's proposal, which is "as small as possible".

We can quantify this if necessary. Probably 1 additional fragment for RPK by value, 1 additional fragment for certificate by reference, in total max 5 fragments.

Göran

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