Which CA class of digital certificates would be used by individuals to perform email verification?
Explanation: The CA class number determines how rigorous the procedure was that verified the identity of the holder when the certificate was issued. The higher the class number, the more trusted the certificate. Class numbers range from 0 to 5. A class 5 certificate is the most trusted, and class 0 the least trusted. Class 1 is used by individuals for verification of email.