Hannes, Personally I think there will be occasions when knowing that media is secured as far as a known PSTN gateway can be useful, so signing by the gateway I think can still have some value. One way to achieve this would be with an email-style SIP URI for the gateway. So I guess the questions are:
1)Whether there is any value in a gateway signing with an E.164-based SIP URI, e.g., sip:[EMAIL PROTECTED];user=phone, and if so whether this needs a qualifier such a source=PSTN. 2) Whether there is any value in a qualifier such as source=PSTN even in the absence of an RFC 4474 signature. John > -----Original Message----- > From: Hannes Tschofenig [mailto:[EMAIL PROTECTED] > Sent: 04 April 2008 09:51 > To: Elwell, John > Cc: [email protected] > Subject: Re: [Sip] RFC 4474 and PSTN > > I would instead not put the SIP Identity header there. > No additional work needed. > > Ciao > Hannes > > Elwell, John wrote: > > There seems to be some interest in adding some indicator to > the URI or > > to the header field to warn of the limited guarantee of > authenticity or > > the opposite (i.e.,lack of such an indicator would mean the > guarantee is > > low, i.e., the identity has not been verified). > > > > I think on this issue it is just a matter of somebody putting things > > together into a draft. I think Dean and/or Adam were the > main initiators > > of this proposal - something like a source=pstn parameter. Would > > somebody care to author a draft? Or do we need further discussion? > > > > John > > _______________________________________________ > > Sip mailing list https://www.ietf.org/mailman/listinfo/sip > > This list is for NEW development of the core SIP Protocol > > Use [EMAIL PROTECTED] for questions on current sip > > Use [EMAIL PROTECTED] for new developments on the application of sip > > > > _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
