Dean Elwood over at VoIPuser.org has taken up the question about Open ID with his post “Why SIP Doesn’t Need OpenID“.  Dean suggests that the problem really lies between servers:

The problem of identity authentication actually resides in the server to server realm in a peered environment. How does sip.fwd.com know for sure that a peered call request is really coming from sip.voipuser.org?

Good question… and one that Dean believes can be solved through the use of the already-standardized Open Settlement Protocol (OSP).

The conversation continues…