When you use public keys and private keys, there are several components which allow this type of security to work. In order to use a public key it requires a certificate authority which has embedded within it a root certificate. The root can be either unsigned or signed and will affect how the public key functions with the public key. Certificates which are unsigned often prompt the user to choose whether they want to trust the certificate.
You May Use a Root Certificate with Two Factor Authentication
Deciding what type of security you want to use within your organization to access different types of data and applications is important. In recent years there has been a shift to move to higher levels of security to protect data from outside hackers. One type of security which is being used more frequently is two factor authentication. This requires two levels of authentication and may include using a root certificate.