Subject: RE: [Sipping] Privacy comment (was Re: calling number blocking a tsip/isup gate way)

From: "Drage, Keith (Keith)" <[email-masked]>
Date: Fri, 1 Mar 2002 10:11:29 -0000

And, modifying To or From in a proxy means that you are no longer a proxy,
but become a B2BUA, which is presumably what you were trying to avoid in the
first place. 

I see no "m" flag at all in the where column against these headers, or any
intention to include it.

Keith

Keith Drage
Lucent Technologies
Tel: +44 1793 776249
Email: [email-masked]

> ----------
> From: 	Dean Willis[SMTP:[email-masked]]
> Sent: 	27 February 2002 3:41
> To: 	Mark Watson; Gonzalo Camarillo
> Cc: 	[email-masked]; Peterson, Jon
> Subject: 	Re: [Sipping] Privacy comment (was Re: calling number
> blocking  atsip/isup gate way)
> 
> 
> Ah, sort of. Modifying a To or From field will still break 2543 systems,
> so
> it's not backward compatible, and there's no "test" for this to allow it
> to
> be detected, so modifying them in a proxy is still a bad idea.
> 
> Also, I think there are some issues with enhanced digest here . . .
> 
> --
> Dean
> 
> 
> ----- Original Message -----
> From: "Gonzalo Camarillo" <[email-masked]>
> To: "Mark Watson" <[email-masked]>
> Cc: "Peterson, Jon" <[email-masked]>; <[email-masked]>
> Sent: Tuesday, February 26, 2002 6:08 PM
> Subject: Re: [Sipping] Privacy comment (was Re: calling number blocking
> atsip/isup gate way)
> 
> 
> >
> > Mark writes:
> > >'From' cannot be used (in all cases) because the UA cannot be required
> > > to reveal the public identity to other users (due to Data
> > >Protection), and the proxy cannot modify the From field. The From field
> > > therefore contains a crypto-random hash or something
> > >similar.
> >
> > Now a proxy can modify the From field. Dialog identification relies
> > solely on tags.
> >
> > Gonzalo
> >
> > _______________________________________________
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> > This list is for NEW development of the application of SIP
> > Use [email-masked] for questions on current sip
> > Use [email-masked] for new developments of core SIP
> >
> >
> 
> 
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> 

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