A first session is established between the log in server and {HEAD ~ the subscriber server} to validate the registrant identification data, and to generate {TAIL ~ a session password} 
to generate
A first session is established between the log in server and { HEAD ~ the subscriber server } to validate the registrant identification data , and to generate { TAIL ~ a session password }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL