US Patent 8250361 Server certificate issuing system and person authentication method

A server certificate issuing system in which existence of a Web server for which a certificate is to be issued can be confirmed and security is further improved is realized, wherein the user authentication is carried out using a test certificate having the SSL certificate format. Servers transmit server certificate request to the registration server which transmits the test certificate request to the test certificate issuing authority. The test certificate issuing server transmits the generated test certificate to the registration server which transmits the test certificate to the corresponding server and requests to install the test certificate. Then, the registration server accesses with SSL protocol to the server and verifies whether or not the session of the SSL protocol has been established. The registration server transmits the CSR to the certificate issuing server only when the SSL protocol has been established.