AW: [Sipping] RE: I-D ACTION:draft-jennings-sipping-pay-02.txt

["Tschofenig, Hannes" <[e-mail]>]

hi henry, 

thanks for the info. please see some comments below:

~snip~
> Third party consumer-business payment models could involve a 
> search engine
> to deliver product information along some advertismens and finally a
> click-to-call service to connect the buyer with the seller. 
> Such calls are
> obviously much more valuable to the seller and the revenue 
> sharing models
> are an interesting topic apart.

this sounds a bit complicated to me.
anyway, maybe we should focus on the technical aspects (rather than on the business models). 
based on your description it seems that you would like to see a model where the following message exchange is possible:

 +--------+           +------------+            +--------+
 |User    |           |Webpage /   |            |Merchant|
 |Alice   |           |Identity    |            |Bob     |
 |        |           |Provider    |            |        |
 |        |           |            |            |        |
 +---+----+           +------+-----+            +---+----+
     |                       |                      |
     |       HTTP            |                      |
     |---------------------->|                      |
     |                       |                      |
     |  Assertion            |                      |
     |<----------------------|                      |
     |                       |                      |
     |                       |                      |
     |       INVITE + Assertion                     |
     |-----------------------+--------------------->|
     |                       |                      |
     |            200 OK     |                      |
     |<----------------------+----------------------|
     |                       |                      |


 is this somehow correct? 

> 
> I would be still interested in the motivation for choosing 
> the particular
> approach in this I-D as well as the pros and cons, though the 
> reference
> <draft-ietf-sipping-spam-00.txt> is most welcome. This is more of a
> discussion paper after all, since no experimental data are 
> available, as
> required for a standards track document.
sounds reasonable but might be fairly complicated since the different approaches are based on different assumptions. 

> 
> Last but not least, these nits are only meant to enahnce the 
> proposal that I
> believe is very interesting

ciao
hannes


> 
> Thanks, Henry
> 
>  
> 
> -----Original Message-----
> From: [e-mail] 
> [mailto:[e-mail]] On Behalf
> Of Tschofenig, Hannes
> Sent: Wednesday, July 20, 2005 10:50 AM
> To: [e-mail]; sipping WG
> Subject: AW: [Sipping] RE: I-D 
> ACTION:draft-jennings-sipping-pay-02.txt 
> 
> hi henry, 
> 
> thanks for pointing to the draft. 
> i think a comparison with other spit proposals is not really 
> necessary given
> the detailed description in 
> <draft-ietf-sipping-spam-00.txt> 
> 
> could you elaborate a bit more on your statement about voip 
> payments using
> either flat rate or complex 3rd party business models?
> 
> ciao
> hannes
> 
> > -----Ursprüngliche Nachricht-----
> > Von: [e-mail] 
> > [mailto:[e-mail]] Im Auftrag von [e-mail]
> > Gesendet: Mittwoch, 20. Juli 2005 17:17
> > An: 'sipping WG'
> > Betreff: [Sipping] RE: I-D ACTION:draft-jennings-sipping-pay-02.txt 
> > 
> > 
> > This is an interesting proposal and deserves some attention.
> > 
> > The title of the ID could be better chosen, even if longer 
> or by some
> > abbreviation, so as to indicate it is an option from SPIT 
> > prevention and not
> > for VoIP payments which are either flat rate (mostly) or have 
> > some complex
> > 3rd party business models.
> > 
> > Also, in the introduction, a short comparison with other SPIT 
> > prevention
> > mechanism would be helpful, as well as presenting the motivation for
> > choosing this particular approach.
> > 
> > Thanks, Henry
> > 
> > -----Original Message-----
> > From: [e-mail] [mailto:[e-mail]] 
> > Sent: Tuesday, July 19, 2005 2:50 PM
> > To: [e-mail]
> > Subject: I-D ACTION:draft-jennings-sipping-pay-02.txt 
> > 
> > A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> > 
> > 
> > 	Title		: Payment for Services in Session Initiation
> >                           Protocol (SIP)
> > 	Author(s)	: C. Jennings, et al.
> > 	Filename	: draft-jennings-sipping-pay-02.txt
> > 	Pages		: 22
> > 	Date		: 2005-7-19
> > 	
> > Communication systems require that a person receiving a call be able
> >    able to charge the caller when they are from different 
> > administrative
> >    domains.  This is necessary for making fair exchanges of service
> >    between two different communicating parties and is a 
> major strategy
> >    for reducing the viability of SPAM.  This draft proposes 
> > an approach
> >    for doing this in SIP.  The approach relies on a third 
> party to act
> >    as a payment service provider and is optimized for very 
> simple, low
> >    value transactions.  It does not provide the full range 
> of services
> >    that are desirable in typical online trading systems.
> > 
> >    This draft is being discussed on the [e-mail] 
> mailing list.
> >    There is currently work to substantially change this draft to use
> >    SAML.
> > 
> > A URL for this Internet-Draft is:
> > 
> http://www.ietf.org/internet-drafts/draft-jennings-sipping-pay-02.txt
> > 
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