[Emu] EDHOC rekey

[Rafa Marin-Lopez <[e-mail]>]

Dear LAKE WG, EMU WG members:

We are in the process of updating EAP-EDHOC I-D, which uses EDHOC inside an EAP authentication.

https://datatracker.ietf.org/doc/draft-ingles-eap-edhoc/

We have been discussing internally about a resumption mechanism. A simple way to define this is doing it in the context of EAP-EDHOC by using Appendix J EDHOC-KeyUpdate. Having said this, I think it would be worth considering an EDHOC rekey exchange (i.e. involving 1 RTT), as something similar as, for example, IKEv2 does. This has the advantage that can be used in contexts different than EAP-EDHOC.

Thus, it is not clear whether we should design this in the context of EAP-EDHOC or, on the contrary, LAKE WG could discuss this in the future. In my humble opinion, discussing this in LAKE WG could allow defining this EDHOC rekey protocol in such a way that could be used in different uses cases as a generic contribution, not just in EAP-EDHOC.  

I would be willing to discuss (and contribute) if LAKE WG is in favor of considering this in the future.

Best Regards.
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Rafa Marin-Lopez, PhD
Dept. Information and Communications Engineering (DIIC)
Faculty of Computer Science-University of Murcia
30100 Murcia - Spain
Telf: [phone] Fax: [phone] e-mail: [e-mail]
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