Secure File Download Class – CodeCanyon

Secure File Download Features
Hide the real download URL .
Create expiring one-time download Keys.
Set the maximum download speed.
Enable/Disable download resuming
Lock out all leechers!
Examples on how to redirect users if the download key is invalid or expired, file is not found or any other error occurs instead of leaving them in front of a blank page.
The Secure File Download PHP Class gives you simple functions to protect your bandwith and to stop people hotlinking your files.

http://codecanyon.net/item/secure-file-download-class/273511?ref=nfo23

https://www.box.com/s/m3hurztp5dnpahju9yqf