> -----Original Message----- > From: Michael Thomas [mailto:[EMAIL PROTECTED] > Sent: 20 February 2008 22:02 > To: Elwell, John > Cc: Paul Kyzivat; IETF SIP List; Henry Sinnreich; > [EMAIL PROTECTED]; Richard Shockey > Subject: Re: [Sip] Infrastructure issues involving e164 numbers > > Elwell, John wrote: > > Paul, > > > > That is not quite what I meant. I meant that for PSTN > interworking there > > is no point in trying to do anything more secure on the SIP > hop than the > > security provided by the PSTN hop and anything beyond the > PSTN. Security > > is only as good as the weakest link. So let's try to be as > good, but not > > better. In the SIP world we can try to be better. > > > > Hold on a second. Doesn't SIP have the concept of > redirection? That is, > even if I use a tel: URL I might get redirected to another > device which > doesn't ever touch the PSTN? > > It sure seems to me that the prudent thing to do is *always* use the > best security you can instead of trying to divine whether it's going > to end up being on a less secure path. [JRE] I agree, but when a PSTN gateway is encountered we may have to downgrade to the level of security appropriate to a mixed SIP-PSTN call.
John _______________________________________________ Sip mailing list http://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
