Re: [CGA-EXT] Review draft-ietf-csi-proxy-send-01

Roque Gagliano <> Wed, 09 December 2009 11:14 UTC

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From: Roque Gagliano <>
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Date: Wed, 9 Dec 2009 12:13:55 +0100
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Subject: Re: [CGA-EXT] Review draft-ietf-csi-proxy-send-01
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> Well, actually that's a feature of CGA's, one can show proof-of-ownership by signing with the CGA's private key. I own my CGA because I generated it and the corresponding key pair, and you do not own it and you can't show proof of ownership because you don't have the private key.
> So I think we want to keep using that term.
> I can agree that we don't want to talk about a prefix owner, though, but I don't think we're doing that in the document. 

I understand, but CGA only refers to IIDs not to the complete address (including the prefix). Coming from the addressing world I have to make the distinction. In our world we talk about "right of use" and not ownership. This means, I have the right of USING this CGA because I have possession of the correspondent private key.

That is something I made clear in the CERT draft.

> The lack of algorithm agility is generic to SEND and not specific to the Secure Proxy ND mechanism. When the WG concludes on how to move forward with algorithm agility, we can publish an RFC updating both RFC3971 and this to be RFC to add algorithm agility. 

So, we know there is a problem and probably know that SEC ADs are looking at these particular issues, however we would to advance this draft to the IESG hopping that it passes their LC with the promise to solve the issue later on? I only have been in CSI for a couple of months but does not sound proper IETF process to me.

The agility discussion also included a signaling between the parties in order to select which algorithm to use. What we can do while that discussion is not over in the WG is to make sure that new SEND options have the possibility of identifying which algorithms each party are using, leaving the signaling part for later. This is similar to DNSSEC where in order to change from SHA-1 to SHA-256 probably all signatures will be for a while duplicated in the zone files.


Roque Gagliano
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