Re: [Sip] Event Lists: Back-End Credentials


Jonathan Rosenberg wrote:
> Its worth noting that this issue has come up in the context of 3gpp, 

Oops - s/3gpp/3pcc

> where it is actually even harder of a problem than it is here. I suggest 
>  folks read section 12.1 of RFC 3725.
> 
> Basically, what is says is that delegation is a hard problem, we don't 
> have a solution for it. So, in the interim, the 3pcc controller set the 
>  From in a specific way in order to be usable in applications which 
> (perhaps sadly) don't authenticate. And that's it.
> 
> I'm not sure if precedent of past acceptability of this kind of 
> statement can help us, but at least there is a precedent.
> 
> -Jonathan R.
> 
> 
> 
> Adam Roach wrote:
> 
>> hisham.khartabil@nokia.com wrote:
>>
>>>
>>>> A consequence of this is that, lacking any other mechanism, the 
>>>> resources in a resource list for which the RLS is not authoritative 
>>>> will contain only the information that their notifier is willing to 
>>>> reveal to the RLS -- which is generally the same information they 
>>>> would render to unauthenticated users. In some cases, this might 
>>>> result in no useful information being transferred.
>>>>   
>>>
>>>
>>>
>>> This limitation by itself kills the idea, IMO. Most presence lists 
>>> will rely on the event list, and if its gonna mean that no useful 
>>> information will come to the watcher, then the whole mecahnism is 
>>> useless.
>>>  
>>>
>>
>> That's a bit of a strong characterization, and it seems to ignore the 
>> remainder of the mail that I sent out; specifically:
>>
>>   1. Users have the ability to subscribe to any resources that the RLS
>>      marks itself as non-authoritative, and
>>   2. (More Importantly) Provisions for delegation of authority are
>>      included -- they're just not in-scope for this document.
>>
>> /a
>>
> 

-- 
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
Director, Service Provider VoIP Architecture   Parsippany, NJ 07054-2711
Cisco Systems
jdrosen@cisco.com                              FAX:   (973) 952-5050
http://www.jdrosen.net                         PHONE: (973) 952-5000
http://www.cisco.com

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