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Re: [BLISS] Comments on draft-procter-bliss-call-park-extension-04 (Privacy Interactions)

Michael Procter <michael@voip.co.uk> Fri, 01 May 2009 11:40 UTC

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Date: Fri, 01 May 2009 12:41:30 +0100
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From: Michael Procter <michael@voip.co.uk>
To: Dale Worley <dworley@nortel.com>
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Cc: bliss@ietf.org, Scott Orton <orton@nortel.com>
Subject: Re: [BLISS] Comments on draft-procter-bliss-call-park-extension-04 (Privacy Interactions)
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Hi,

2009/4/30 Dale Worley <dworley@nortel.com>:
> If you want to use anything approaching "endpoint call control", that
> is, anything more complex than an in-dialog REFER, then the anonymized
> Contact has to route to Alice, or rather, the privacy service fronting
> for Alice.  So it would have to be similar to a "temporary GRUU" (see
> draft-ietf-sip-gruu-15), a URI which is secretly mapped to a unique
> target but for only a limited time.
>

As Dale notes, this isn't a call-park specific problem, but a more
generic call control problem.  And he also notes that Alice should
implement temporary GRUUs or some similar feature.  These sorts of
issues are discussed more fully in draft-ietf-sip-ua-privacy-09, and a
UA hoping to achieve private operations should consider the mechanisms
discussed in there to achieve it.

Michael

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