Which of the following terms refers to a mechanism which proves that the sender really sent a
particular message?
A.
Integrity
B.
Confidentiality
C.
Authentication
D.
Non-repudiation
Explanation:
Non-repudiation is a mechanism which proves that the sender really sent a message. It
provides an evidence of the identity of the senderand
message integrity. It also prevents a person from denying the submission or delivery of the message
and the integrity of its contents.
Answer option C is incorrect. Authentication is a process of verifying the identity of a person or
network host.
Answer option B is incorrect. Confidentiality ensures that no one can read a message except the
intended receiver.
Answer option A is incorrect. Integrity assures the receiver that the received message has not been
altered in any way from the original.