VNC Encryption- Free Version

Hello,

I am trying your free version to see if I want to purchase. However, I want to make sure my sessions are encrypted, even while I am trying the free version. I am on iPad, and the remote computer is currently using Windows 7 Home Edition. I am connecting via VNC and auto-discovery. I found some literature that stated 128-bit encryption on VNC via auto-disovery in the paid version. But does this apply to the free version as well? If so, is the whole session encrypted, or just the login? If I change to Windows 7 Platinum and use RDP, are all sessions encrypted on both free and paid versions? Thanks for your help.