Method of and apparatus for authenticating client terminal by making use of port access

摘要

Each time one of a predetermined n number of authentication ports is accessed by a client terminal, a server checks to see if all of the n number of authentication ports have been accessed. If all of the n number of authentication ports have been accessed, the server determines that it has succeeded in authenticating the client terminal, opens its communications port to the terminal, and gives right of access to the client terminal.