Originally Posted by from the website
This is a fully secure procedure and a full refund is given for any cases not rectified.
You should be aware that the non-enterprise version of RealVNC does not have any session encryption. Therefore the procedure is not fully secure. Sessions can theoretically be intercepted, keystrokes logged etc. You really should be using Ultravnc Single Click
for this if you are trying to make a business out of it. It's a single-file version of the UltraVNC server with no registry usage, and with the connection initiated by the server. It also has session encryption.