The registration authority (RA) is the component that accepts a request for a digital certificate and performs the necessary steps of registering and authenticating the person requesting the certificate. The authentication requirements differ depending on the type of certificate being requested.
The types of certificates available can vary between different CAs, but usually at least three different types are available, and they are referred to as classes:
- Class 1 A Class 1 certificate is usually used to verify an individual’s identity through e-mail. A person who receives a Class 1 certificate can use his public/ private key pair to digitally sign e-mail and encrypt message contents.
- Class 2 A Class 2 certificate can ...