Re: [P2PSIP] draft-ietf-p2psip-base publication to be requested

[Diego Suarez <[e-mail]>]

Hi, 

I had in mind writing a draft about this, but since I'm running out of
time, I would like to summarize a new certification model for P2PSIP I
have been working on, in case it is of interest for the group.
Further details can be found in paper:

D. Touceda, J. Camara, L. Villalba, and J. Marquez, “Advantages of
identity certificate segregation in P2PSIP systems,” Communications,
IET, vol. 5, pp. 879–889, Apr. 2011.


The idea is to split the certification of users and devices. Devices are
identified by PKCs including a nodeID and the PK of the device, while
users are identified by PKCs including a username and the PK of the
user. Similar models have been used before in other communications
systems, such as GSM where devices and users are separately represented
by the international mobile equipment identity (IMEI) stored in the
phones and the international mobile subscriber identity (IMSI) stored in
the user subscriber identity module (SIM), respectively.

Motivations of this model are:

- Users and devices are different entities performing different
roles within a P2PSIP system. Devices are nodes of the P2P
overlay network (represented by a nodeID) that offer services
(to route messages, to store data, . . .) to the system, while
users (represented by an username) utilize these services,
usually to establish media communications using SIP.

- Support for mobility scenarios where a user may be logged at different
devices at the same time using the same PKC.

- Support several users to be logged in the same device (like a fixed
phone) at the same time.

- Support for user independent hard-coded devices.

- Interoperability with SIP. SIP certificates are not valid in actual
P2PSIP since they don't include a nodeID.

cheers

Diego Suárez


On Wed, 2011-06-08 at 09:48 -0700, David A. Bryan wrote:
> Unless something major comes up, we plan to request the newest version
> of the base draft, draft-ietf-p2psip-base-15, be published. I'll put
> in the request in a week (June 16th or 17th). If there are any further
> comments from the last call a while ago (or further comments on the
> comments since then), please send them to the list ASAP.
> 
> Thanks,
> 
> David (as chair)
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