an authentication requesting unit configured to, when the verifying unit determines {HEAD ~ an authentication success}, provide the second terminal authorization certificate stored in the terminal authorization certificate table to the second terminal and perform a second authentication request for requesting the second terminal to authenticate {TAIL ~ the terminal}, 
an authentication requesting unit configured to , when the verifying unit determines { HEAD ~ an authentication success } , provide the second terminal authorization certificate stored in the terminal authorization certificate table to the second terminal and perform a second authentication request for requesting the second terminal to authenticate { TAIL ~ the terminal } ,
OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH