The SSL (Secure Sockets Layer) is in simple definition is a standard security technology that is used to establish encrypted links between the web browser and the server. When the SSL certificate is activated it in turn activates a padlock and the https protocol so to ensure secure connection between the server and the web browser.
The CA (Certificate Authority) is a legal and trusted entity that functions to manage and issue security certificate and also the private keys which are both used for secure connections in any kind of public network. The certificate verifies information provided the requestor alongside the registration authority which both are part of the public key infrastructure (PKI).
This is the most important responsibility of the certificate authority. Upon which it verifies all the information to be correct and also within all the stated guidelines set under the CA/B forum, the certificate authority goes ahead to issue the SSL certificate. The web browser will in turn recognize the authenticity of the website and then gives secure connection sign to the web visitors. With the HTTPS having been configured properly then the website displays several visual indicators like the padlock.
Roles of a Certificate Authority (CA).
The three certificate levels include:
They provide the highest level of security hence most expensive. For the applicants of the EV certificates the Certification Authority Browser Forum clearly and fully defines the process of validation for them.
They provide middle security level of assurance. The certificate authorities conduct some level of verification processes. They can be issued if the applicant demonstrates that it holds some level administration control of the domain name for which the certificate requested.
These certificates only require that the requestor to demonstrate ownership of the domain for the certificate under issue. The DV certificated are issued under no/low cost and acquired almost instantly.