In case you offer goods and services on your website and you would like the payment data that clients submit to be secure, you will need an SSL certificate. Secure Sockets Layer is a protocol which encodes the information exchanged between a user and a server, but in order to get an SSL, you'll need a Certificate Signing Request (CSR). This is Base64 encoded information that the SSL vendor will use to create the certificate. The CSR contains the web address, Business name and Unit, postal address and e-mail of the entity which will use the certificate. The Certificate Authority reviews and approves the CSR before it provides an SSL certificate which is signed digitally using its private key as an authority. To install an SSL, you will need a total of 4 batches of code - the CSR, a Private Key that is created after you generate the Request, the actual certificate plus a special Certificate Authority code, which is unique for each and every vendor.