Re: [privacydir] request for a SAVI doc review

Stephen Farrell <stephen.farrell@cs.tcd.ie> Tue, 01 November 2011 11:30 UTC

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Date: Tue, 01 Nov 2011 11:30:41 +0000
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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To: Ted Hardie <ted.ietf@gmail.com>
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Cc: privacydir@ietf.org
Subject: Re: [privacydir] request for a SAVI doc review
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Hi Ted,

I've also had a read of this now and agree with you. I'm putting
in a discuss that says:

"This makes no mention at all of privacy which I think needs to
be there somewhere. Given that Joel is planning to add text on
that to savi-threats I'd be fine if that is just referenced from
here, or even if that text is moved from savi-threats to this
document, and savi-threats could refer to it here. But the
privacy implications of SAVI do need to be covered here too."

I think that ought be ok since I expect Joel to do a good
job on this in the savi-threats document. I also put in a link
to your mail as a comment.

Let me know if you think that more or something else is
likely to be needed.

Thanks again for the review,
S.


On 10/31/2011 08:07 PM, Ted Hardie wrote:
> Hi Stephen,
>
> I've read through the framework document.  My baseline impression is that
> the document makes a presumption about the relationship between the host
> and the network employing SAVI that is true when it is the access network
> (that is, the network assigning the IP address to be verified).  In that
> deployment scenario, it is expected for the network to be able to associate
> layer two identifiers with the layer 3 identifier (after all, it must to be
> able to deliver return traffic).
>
> What's not clear to the naive reader (read: me) is how you prevent SAVI
> from operating from other parts of the network; that is, how does the
> overall framework guard against SAVI being used by some later network
> on-path getting access to these bindings? I assume that this is detailed
> elsewhere in the protocol documents, but I believe a short discussion of
> the privacy threat in framework, along with a pointer to the protocol
> mechanism would be valuable.
>
> If the expectation is that SAVI can operate from multiple places in the
> network (including, say, the destination network), then I believe there is
> a more serious privacy concern.
>
> regards,
>
> Ted Hardie
>
> On Thu, Oct 27, 2011 at 9:07 AM, Stephen Farrell
> <stephen.farrell@cs.tcd.ie>wrote;wrote:
>
>>
>> Hi,
>>
>> There's a SAVI document [1] on the Nov 3 telechat. I'd appreciate
>> a review of that from a privacy perspective if someone has the
>> time in the next week. (Just reply to this if you've time.)
>>
>> Previous SAVI documents have generated privacy related
>> DISCUSSes [2,3] which may be useful background.
>>
>> Thanks in advance,
>> S.
>>
>> [1] https://datatracker.ietf.org/**doc/draft-ietf-savi-framework/<https://datatracker.ietf.org/doc/draft-ietf-savi-framework/>
>> [2] https://datatracker.ietf.org/**doc/draft-ietf-savi-fcfs/<https://datatracker.ietf.org/doc/draft-ietf-savi-fcfs/>
>> [3] https://datatracker.ietf.org/**doc/draft-ietf-savi-threat-**scope/<https://datatracker.ietf.org/doc/draft-ietf-savi-threat-scope/>
>>
>> ______________________________**_________________
>> privacydir mailing list
>> privacydir@ietf.org
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>>
>