A web browser communicates through a secure local proxy to a web server that has an interface for secure communications. The application server has an application program conforming to the CGI programming model that can run continuously as a process and can maintain state information, such as pointers...http://www.google.com.hk/patents/US5857191?utm_source=gb-gplus-share專利 US5857191 - Web application server with secure common gateway interface
