Re: [6tisch] draft-tiloca-6tisch-robust-scheduling-01 --- rekeying permutation key

Mališa Vučinić <malisa.vucinic@inria.fr> Fri, 05 April 2019 21:10 UTC

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Date: Fri, 5 Apr 2019 23:10:16 +0200
Cc: Marco Tiloca <marco.tiloca@ri.se>, 6tisch <6tisch@ietf.org>, draft-tiloca-6tisch-robust-scheduling@ietf.org
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To: Michael Richardson <mcr+ietf@sandelman.ca>
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Subject: Re: [6tisch] draft-tiloca-6tisch-robust-scheduling-01 --- rekeying permutation key
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> On 5 Apr 2019, at 20:15, Michael Richardson <mcr+ietf@sandelman.ca> wrote:
> 
> If we could delay the switch to the new schedule until *after*
> COJP_REKEYING_GUARD_TIME has elapsed, then that might work.
> Alternatively, if we could number the rekeys then a EB could signal the
> switch to the new schedule some time after the keys are changed.

Not sure about that the exact switch after COJP_REKEYING_GUARD_TIME would work, different nodes receive the new keys at different instants so it would be hard to sync them. I like better the trigger with an EB, it originates at 6LBR that is trusted and the frame can be authenticated by the nodes that have installed the new keys.

Mališa