Allows secure access to your digital products (software, eBooks etc) after successful transaction on Paypal. Uses Paypal's IPN system coupled with Linklok's unique download link system for security. Download links do not show location of file on server and can be set to expire after several minutes, days or years if required. Supports multiple currencies, unlimited products and multiple downloads per order. Linklok is very secure as there is no way to bypass Paypal. No DB or cookies required.