SINGLE SIGN-ON USED FOR NETWORK SYSTEM INCLUDING PLURAL INDIVIDUALLY CONTROLLED LIMITED ACCESS RESOURCES

摘要

PROBLEM TO BE SOLVED: To provide a method and system by which a user is authenticated by means of a client server system as that only a single master password is enough for the user to remember which the user signs on many servers by using passwords different in each server. SOLUTION: A client produces a set of server specific authentication information for a 1st server from the master authentication information stored by the client and the data on 1st server (200-212). Then the client supplies the authentication information specific to the 1st server to the 1st server to access the limited resources which are controlled by the 1st server (214). The authentication information specific to the 1st server is different from the master authentication information. Thus, a manager of various servers never has the information with which another server can access the account of a user.