Using a PAKE within HIP for enrollment

I am looking at a HIT enrollment function using 5403-bis.  But why 
should the Registrar accept the Register.  This is our basic need of an 
Out-off-Band process to trust an enrollment.


So assume that some process establishes a PSK between the two parties.  
Perhaps a failed enrollment that sent the phone's # that returns an SMS 
message with the PSK.  The enrollment then grabs that PSK and uses a 
PAKE HIP parameter for authentication.  This would be stronger than what 
I have in DEX...


I would like to get the draft done this week, or early next week.  It is 
mostly written.  But I need to put in the trust for the enrollment.  I 
can either lift what I have in DEX, or go with one of the PAKE efforts 
in CFRG.  But which one and how would it work in HIP BEX/DEX?


Thanks