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