(ISC)2 CISSP-ISSAP Exam Which of the following terms refers to a mechanism which proves that the sender really sent a particular message?

The correct answer is D. Non-repudiation. Non-repudiation (D) is the security property that provides proof of the origin and integrity of a message, ensuring a sender cannot later deny having sent it - this is exactly what the question describes. Integrity (A) ensures data hasn't been altered in transit, but says…

Identity and Access Management (IAM) Architecture

Question

Options

AIntegrity
BConfidentiality
CAuthentication
DNon-repudiation

How the community answered

(28 responses)

B
7% (2)
C
4% (1)
D
89% (25)

Explanation

Non-repudiation (D) is the security property that provides proof of the origin and integrity of a message, ensuring a sender cannot later deny having sent it - this is exactly what the question describes. Integrity (A) ensures data hasn't been altered in transit, but says nothing about proving who sent it. Confidentiality (B) protects data from unauthorized disclosure - it's about secrecy, not proof of origin. Authentication (C) verifies who you are at a point in time (e.g., login), but doesn't create an irrefutable record binding a specific message to its sender.

Memory tip: Think of non-repudiation like a certified mail receipt - the post office creates proof that you sent the letter, so you can't "repudiate" (deny) it later. Digital signatures are the primary technical mechanism that achieves this.

Topics

#Non-repudiation#Digital signatures#Message authentication#Sender authentication

Community Discussion

No community discussion yet for this question.

Full CISSP-ISSAP Practice