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Re: [lisp] Virtual meeting

Dino Farinacci <farinacci@gmail.com> Wed, 01 April 2020 00:27 UTC

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From: Dino Farinacci <farinacci@gmail.com>
In-Reply-To: <b43577df-0c51-beba-372e-5cdbb9d68f18@joelhalpern.com>
Date: Tue, 31 Mar 2020 17:27:12 -0700
Cc: "Alberto Rodriguez Natal (natal)" <natal=40cisco.com@dmarc.ietf.org>, "lisp@ietf.org" <lisp@ietf.org>
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To: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [lisp] Virtual meeting
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> Sorry, yes, it is the MS, not the MR, who provides the information to construct the key, since it is the MS who is generating the notifies. Sorry I still cross them up.

Oh good. That is more clear now. So if you are saying this:

(1) Use LISP-sec as defined today.
(2) Have the MS wrap some new key material with the MS-OTK and pass it to the ETR.
(3) The ETR replies as it does today but we have new protected key material in the Map-Reply.
(4) The MS stores the new key-material.
(5) The ITR generates the new key-material because it can unwrap the MS-OTK that is derived from the ITR-OTK.
(6) Any subsequent unsolicited Map-Notify messages from the MS (for an RLOC-change) are signed with the new key-material. Which the ITR can verify since it has the new key-material from step (5).

That is a shared-key created with the pair of OTKs. I think that can work. Fabio needs to verify.

I know you didn’t say all these details but I’m progressing your point, for discussion.

Dino

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