Securely view files on my computer with my iPhone

Hello,

I posted a similar question at a different forum site and did not get much so I figured I would see if anyone here has a solution.

I am looking for a cheap and easy app that will let me view files on my computer with my iPhone. Obviously, I would only be able to view files the iPhone can open, but that is okay. And the big thing is I want to do it securely.

Ideally, I would like a program that can SFTP from the phone to the computer. I am not tying to SFTP into the phone. The best thing I could find is EZSharePro but it is a bit expensive.

Right now, I use Dropbox but it only allows me what is in my Dropbox folder and I want access to my enitre system. It seems like a fairly easy concept and an easy app but I cannot find it.

Any ideas?

Thanks,
Justin