Integrated Session Security
Integrated Session Security provides protection from connection snooping, man-in-the-middle attacks and packet-tampering attacks, to name but a few.

Server Authentication uses 2048-bit RSA keys to verify identity.
Viewer Authentication supports both usernames and passwords of up to 256 characters each.
Secure Communication with 128-bit AES—the experts' choice for high performance encryption.
Platform-Native Authentication
Platform-Native Authentication removes the need for separate VNC and system passwords. Users can access their desktops using the same credentials with which they log on to the system. For Windows this is authentication via NT-Domain or Active Directory, and for Unix is via NIS/NIS+.

One-Port HTTP & VNC
One-Port HTTP & VNC allows VNC Server to serve VNC Viewer for Java and VNC sessions through a single TCP port, simplifying NAT and firewall configuration.