Upload and Download Files

[Ghalt]

I'm looking for a way to allow users of a certain access level to, from the blog itself, be able to upload files, and download them again. (essentially using the blog as a virtual hard drive)

...and I want to do this securely. I am even willing to go so far as using .htaccess to password-protect the entire domain name for security, since we don't want anyone accessing the files that we save.

And we'd like to be able to do this without accessing the admin panel. ie: from a specific blog page be able to upload a file, see the list of files uploaded, and download them again later if needed.

Is there a WP plugin that allows this, or some other process?

Thanks!