Product's authentication code


Im looking for product’s authetication system. Basicilly people will type the secure key-code from the product to authenticate that’s genuine. I need to easly generate and have all the codes in database becase I want print the codes and place them under scratch off sticker.

Could anybody help me with that please?

Best regards

I think I have seen something similar at CodeCanyon. Don’t remember the link but you can check ( If it’s for WordPress )

You may want to use this one -

Works with all types of PHP scripts (applications, plugins, themes, WordPress, etc.)