A certificate authority is the system used to generate and create your digital certificates. This type of system can create digital certificates for a variety of different purposes, including two factor authentication, digital signatures, and access control. You can combine any of these features together into a single digital certificate. Or you can use separate digital certificates for each purpose. Without this system, you would not be able to create your own digital certificates.
Who Controls and Operates a Certificate Authority System?
There are different types of certificate authority systems for you to use to create digital certificates. You can use your own in-house solution, which is where you have complete control of the CA system. Another option is to use the CA system as a managed service. This is where someone else runs the CA system, but will either give you the required access to create your own digital certificates or will create the certificates for you.