User authentication information for network of a user and a name of a server to be accessed are sent from a client terminal to a user management equipment realized by one of servers which constitute a network system. The user management equipment sends the network address of that server and user authentication...http://www.google.com.tw/patents/US5671354?utm_source=gb-gplus-share專利 US5671354 - Method of assisting server access by use of user authentication information held in one of servers and a method of assisting management user account for use of servers 
