How do I sell an e-book on paypal with unique one time code?

Hi,

I am trying to figure out how to sell an e-book using paypal where the customer clicks on the button , goes to paypal thing to pay, then gets a unique code to download, so that the site can't be copied and given out to others for download of the product. Any ideas?

Epic visual tool

Epson 5030UB 2D/3D 1080p 3LCD Projector Submitted November 05, 2015 at 03:14AM by wingsAbove http://ift.tt/1GMAwz4