Which of the following is the MOST appropriate method to protect a password that opens a
confidential file?
A.
Delivery path tracing
B.
Reverse lookup translation
C.
Out-of-band channels
D.
Digital signatures
Explanation:
Out-of-band channels are useful when it is necessary, for confidentiality, to break a message into
two parts that are then sent by different means. Digital signatures only provide nonrepudiation.
Reverse lookup translation involves converting ;in Internet Protocol (IP) address to a username.
Delivery path tracing shows the route taken but does not confirm the identity of the sender.