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