Re: [Sip] Alternative SIP Identity Approach (was re: Thoughts on SIP Identity)

["Dan Wing" <dwing at cisco.com>]

> Here's the problem... if I trust a B2BUA, it doesn't necessarily mean 
> that I'll trust everything it trusts. If Bob's UA is going to make an 
> informed choice, we need it to be able to examine a chain of 
> custody for the identity, at the very least.

The chain would be good, but I would be happy with the first link: 
who (claims to have) injected the message into the SIP network.  Even
if the message transited over some itty-bitty ITSP in a country I had
never heard of, it wouldn't matter if I could verify the identity of
who injected the message into the SIP 'cloud'.

-d


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