A digital certificate system:

Question $43$ options:

A$)$

uses tokens to validate a user's identity.

B$)$

protects a user's identity by substituting a certificate in place of identifiable traits.

C$)$

uses third party CAs to validate a user's identity.

D$)$

uses digital signatures to validate a user's identity.

E$)$

is used primarily by individuals for personal correspondence.