Abstract: An authority group definition that defines a combination of utilization authorities as an authority group, user information required to register local user information or to convert externally acquired user information into a format that is available, connection and authentication method information that defines a connection method and an authentication method for the external system etc., and authority conversion information required to map authority-related items of the externally acquired user information to the authority group. A login process section includes a login screen process section which allows a client PC to controllably display a login screen on an interface, a user information acquisition section which acquires user information from basic external operation systems and a local server, an authentication process section, a user information conversion process section, and a user information update process section.

Abstract: An authority group definition (121) that defines a combination of utilization authorities as an authority group, user information (122) required to register local user information or to convert externally acquired user information into a format that is available, connection and authentication method information (123) that defines a connection method and an authentication method for the external system etc., and an authority conversion information (124) required to map authority-related items of the externally acquired user information to the authority group.