* Matthew Toseland <toad at amphibian.dyndns.org> [2007-09-29 21:49:38]:

> > +                        * M3:
> > +                        * Initiator echoes the data sent by the responder 
> including the authenticator.
> > +                        * This helps the responder verify the authenticity 
> of the returned data.
> 
> I believe there is more going on than this in message 3? E.g. there is the 
> (almost) same encrypted signature as in message 4.

The purpose of the message3 is for the responder to ensure that the
initiator is who it claims to be...

And to pass a few parameters from the initiator to the responder
(bootID, znoderef)...

Ok, I'll be a bit more verbose in comments about the message format :)
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