The remote execution component of X11R6.3 is designed to overcome these problems. Second, X11R6.3 integration with HTTP protocols makes access to applications platform independent. From point of view of the a Web page creator, X11R6.3 gives exacting control over how a Web page looks, in a way not available using HTML alone. It provides layout control with internationalization and allows for a full graphics capability, not just static pre-created images. Trusted applications are applications inside your firewall gateway.
Untrusted applications are outside the firewall.
X11R6.3 security prevents untrusted applications from stealing, destroying or modifying any trusted application's data. The security system consists of three pieces. First, a small piece of code that runs in the corporate firewall. Second, security extensions in the X11R6.3 server. And third, a security manager that works with the user to authorize exchanges between trusted and untrusted applications.