Which of the following terms refers to a mechanism which proves that the sender really sent a
particular message?

A.
Confidentiality

B.
Non-repudiation

C.
Authentication

D.
Integrity

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
received message has not been altered in any way from the original.