If you intend to use an SSL Certificate on your site, to protect the payment and login data that users post, you will need a Certificate Signing Request, or CSR. The Request contains all the information for the entity which will use the SSL in an encoded form, such as the exact website address for the site, the Business/Organization name, physical and e-mail address. It has to be sent to a service provider, or Certificate Authority, which reviews the provided info and depending on it, issues the SSL certificate. The actual SSL installation requires 4 bits of code - the certificate, the CSR, a specific private key that is generated along with the CSR and the SSL vendor private key. A site which has an SSL installed can be opened with https:// instead of the usual http:// and the information submitted for the CSR will be viewed in standard text format from an Internet browser.