Re: [Lake] LAKE background

Eric Rescorla <ekr@rtfm.com> Wed, 17 July 2019 22:31 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 17 Jul 2019 15:30:25 -0700
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [Lake] LAKE background
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On Wed, Jul 17, 2019 at 2:43 PM Michael Richardson <mcr+ietf@sandelman.ca>
wrote:

>
> Göran Selander <goran.selander@ericsson.com> wrote:
>     > presenting message sizes (see Figure 5 of [2]). At least message
> sizes
>     > for PSK ECDHE and RPK ECHDE are needed for comparison.
>
> To add to requirements:
>   I need assymmetric PKIX certificate (or reference to such, PHB's udf:
>   mechanism is appealing) in one direction, and RPK in the other.
>
>     > 4. It is urgent to conclude on this issue.
>
>     >    * There is no standard for deploying OSCORE with forward secrecy.
>     >    * Dependent specifications have been stalled for a long time.
>
> The only reason I will buy a LAKE that uses PSKs is because of a need for
> PFS.
> I think, if you have pre-exchanged PSKs, that you are otherwise done.
>

Hm.... Generally, you still need a protocol to do association setup,
anti-replay, etc.

-Ekr


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