> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dean
> Willis
> Sent: Friday, November 21, 2008 10:56 AM
>
> I crate a CA cert claiming to be for "elwell.org" and use it to sign a
> cert for "sip.elwell.org".
> I then generate INVITE requests for everybody on the SIP mailing list,
> with RFC 4474 Identity headers signed by "sip.elwell.org" and send
> them off UDP. Not from a real SIP UP, but from a simple harassment
> program.
>
> How do existing identity mechanisms protect against this?

The answer to that is simple: will you pay for the calls?

-hadriel
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