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