INTERNET SECURITY SYSTEM HAVING AN ENHANCED SECURITY AND OPERATING METHOD THEREOF

摘要

PURPOSE: An internet security system with enhanced security performance for an external malicious program is provided to protect internal system from an inflow of illegal program without a notice. CONSTITUTION: An authenticated user computer connects an external internet network through a security server(1300). A first firewall(1210) is arranged between an internal communication network and a security server. The first firewall blocks some parts of communication between the internal communication network and the security server. A second firewall(1220) is arranged between the security server and an external internet network. The second firewall blocks some parts of communication between the external communication network and the security server.