We are looking for a clone of [url removed, login to view] or cbprotect.com. Basically these systems both work in the same way and allow the locking of digital products, namely eBooks, PDF's, exe's etc which are then sold to end users. When opened, the system verifies online that the license key is still valid before deciding whether it can be opened or not. A simple control panel can be accessed to disable any digital product following say, a refund or suspicion of software piracy. The systems also track IP addresses so you can see if more than one IP address is using the same digital product. As we will be renting the system to our clients on a monthly basis we will need auto account generation and integration with payment providers like Paypal, Worldpay etc.
Minimum spec as per [url removed, login to view] is required but we would be open to suggestion for any enhancements to the product.