| 摘要 |
PROBLEM TO BE SOLVED: To enable information transmission with an external device without modifying the external device.SOLUTION: A certificate relay server 4 is provided in an ID cooperation system SS1, and a certificate management server 5 outside the system is connected to the certificate relay server 4 through a network NW. In the certificate relay server 4, when a certificate acquisition request is transmitted from service provision servers 1 and 2 within the system, information associated with a user identifier of the own device included in the request or a user identifier of the own device is converted into a certificate DN used by the certificate management server 5 on the basis of conversion information stored in a user identifier conversion information storage unit 421. The certificate acquisition request including the certificate DN is transmitted to the certificate management server 5. |
