15 apr 2012 kl. 19:31 skrev Kevin P. Fleming:

> On 04/15/2012 12:23 PM, Vineet Menon wrote:
> 
>> Ya I agree that initiating a new transaction just for convey non-auth.
>> seems messy.....
> 
> i think you've missed the important point here: if you send a SIP 
> request to a UAS, you are implicitly authorizing them to respond to that 
> request. It doesn't seem like there would be any value in requiring a 
> UAS to be required to authenticate itself in order to respond to a request.
> 
Do remember that a SIP request can fork, so the CALLER might not
have a relation to the UA or identity that answers.

There are calls where you want bidirectional assured identity.

/O
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