Re: [Sip] GRUU and Anonymity

[Dale.Worley at comcast.net]

   From: Jonathan Rosenberg <jdrosen at cisco.com>

   So what is your view on the specific mechanism I was proposing to meet 
   this objective? Namely, that the registrar would provide you with a 
   'regular' gruu and a pseudononymous one, and the latter changes every 
   time you create a new registration (not refresh, a new one entirely).

I agree that you've shown the necessity of modifying GRUU to support
this level of anonymity.  But one clarification -- is the
"pseudononymous GRUU" expected to have a longer lifetime than the
registration, or do you envision it having the same lifetime?

If the latter, it seems that implementing "pseudononymous GRUUs" is
simple, and not much of a burden on Registrars, since they can be
created by any method and stored in the record of the registration.
If the former, then we need to consider how a family of pseudononymous
GRUUs for each UA can be managed.

Dale

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