{HEAD ~ an authentication} requesting {TAIL ~ unit} configured to, when the verifying unit determines 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 the terminal, 
{ HEAD ~ an authentication } requesting { TAIL ~ unit } configured to , when the verifying unit determines 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 the terminal ,
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