VNC^® Enterprise Edition User Guide

Relaxing the encryption rules

By default, all network communications between a client and host computer are encrypted using 128 bit AES technology. Authentication credentials are protected by 2048 bit RSA public keys.

You can relax the encryption rules if you are sure all potential client computers are within a secure network environment, and that eavesdropping is impossible. This may improve performance. It may also allow older versions of VNC Viewer that do not support encryption to connect. For more information on eavesdropping, see Uniquely identifying VNC Server.

Note: Even if encryption is turned off, passwords are still encrypted.

To relax the encryption rules, open the VNC Server Properties dialog. For more information on this dialog, see Using the VNC Server Properties dialog. On the Connections tab, select an alternative to the default Always on option from the Encryption dropdown:

(Windows XP)

For more information on the alternative encryption options, read the appropriate section below.

Prefer on

Encryption is turned on. However, a client computer user can turn it off by selecting Prefer off in the VNC Viewer: New Connection dialog before connecting to VNC Server.

Prefer off

Encryption is turned off. However, a client computer user can turn it back on by selecting either Prefer on or Always on in the VNC Viewer: New Connection dialog before connecting to VNC Server.

For more information about selecting encryption options when connecting to VNC Server, see Step 4: Select an encryption option.