Which of the following is the BEST method for the company to prove Vie authenticity of the message?

exams CAS-003 CAS-003 exam 0 Comments

A company enlists a trusted agent to implement a way to authenticate email senders positively.

Which of the following is the BEST method for the company to prove Vie authenticity of the message?
A . issue PlN-enabled hardware tokens
B . Create a CA win all users
C . Configure the server to encrypt all messages in transit
D . include a hash in the body of the message

Answer: A