試題詳解

28. The CIO asks you to ensure that all e-mails have strict non-repudiation. How can a PKI system solve this issue?
(A)Managing symmetric keys for e-mail encryption
(B)Forcing all users to use two-factor authentication when accessing the e-mail server
(C) Using PKI to support TLS on the SMTP delivery
(D) Issuing a digit certificate to all users for signing e-mails