{HEAD ~ The second SE} verifies the users identity, and upon verification, generates data authenticating {TAIL ~ the transaction} 
{ HEAD ~ The second SE } verifies the users identity , and upon verification , generates data authenticating { TAIL ~ the transaction }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL