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[Sframe] Key ratchting

Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com> Thu, 06 October 2022 09:15 UTC

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From: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>
Date: Thu, 06 Oct 2022 11:14:46 +0200
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Subject: [Sframe] Key ratchting
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Hi all,

As we prepare to publish the new version of the draft (currently available
on https://github.com/sframe-wg/sframe/blob/main/draft-ietf-sframe-enc.md),
I would like to bring back a topic for discussion: key ratcheting.

If I recall correctly, key ratcheting was removed from the SFrame draft as
this feature would be provided by MLS, which would just generate a new key
internally and set it in SFrame when ratcheting is needed.

However, SFrame must be usable without MLS, so I think we should bring back
the ratcheting feature to support other keying mechanisms. What are your
thoughts?

Best regards
Sergio

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