All submissions of payment info using Checkout are made via a secure HTTPS connection. However, in order to protect yourself from certain forms of man-in-the-middle attacks, you must serve the page containing the payment form over HTTPS as well. In short, the address of the page containing Checkout must start with https:// rather than just http://.
If you are not familiar with the process of buying SSL certificates and integrating them with your server to enable a secure HTTPS connection, check out the links below for more information.
Do I already have SSL? Check with either:
SSL Certificate Purchasing Options
- You may choose to purchase an SSL certificate directly though you DNS provider, OR
- you can view SSL reviews via https://www.sslshopper.com/cheapest-ev-ssl-certificates.html