CISSP – Information Systems Security Management Professional (ISSMP) — Question 41

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

Answer options

• A. Non-repudiation
• B. Confidentiality
• C. Authentication
• D. Integrity

Correct answer: A

Explanation

Non-repudiation ensures that the sender cannot deny sending a message, providing proof of origin. Confidentiality protects the content of a message from being accessed by unauthorized parties, while authentication verifies the identity of the sender. Integrity ensures that the message has not been altered during transmission.