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