Using Webex over SSL

Hello all,
I have setup webex lite on a secure server, using SSL.

What I'm wondering is this:  since people are using this over a secure port, does that mean when the upload feature of webex is used to upload files, that those files are being transmitted securely as well?  i.e.  They are being encrypted, transmitted, and decrypted much the same way as form information is?

I'm trying to find a more secure file uploading solution to replace our FTP server, because we are uploading sensitive data.

Thanks in advance,
Matt