If you intend to use an SSL Certificate for your site, in order to protect the payment and login information that users upload, you will need a Certificate Signing Request, also known as CSR. The Request contains all the info for the entity that will use the SSL in an encoded form, for example the exact website address for the site, the Business/Organization name, physical and email address. It has to be submitted to a vendor, or Certificate Authority, which reviews the posted data and based on it, gives the SSL certificate. The actual SSL installation requires four different bits of code - the certificate, the CSR, a unique private key which is generated alongside the CSR and the SSL vendor private key. A site which has an SSL installed can be accessed with https:// rather than the usual http:// and the info submitted for the CSR can be viewed in standard text format via an Internet browser.