If you offer services and goods on your site and you'd like the payment info that clients upload to be risk-free, you should use an SSL certificate. Secure Sockets Layer is a protocol that encodes the info exchanged between a user and a web server, but in order to obtain an SSL, you will need a Certificate Signing Request (CSR). This is Base64 encoded info that the SSL service provider will use to create the certificate. The CSR features the web address, Business name and Unit, postal address and email of the business which will use the certificate. The Certificate Authority studies and authorizes the CSR before it gives an SSL certificate which is signed in an electronic format with its private key as an authority. To be able to set up an SSL, you need an overall of 4 batches of code - the CSR, a Private Key that is created when you generate your Request, the actual certificate plus a special Certificate Authority code, that's unique for every single vendor.