CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 28

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

Answer options

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

Correct answer: D

Explanation

The correct answer is D, Non-repudiation, as it ensures that the sender cannot deny having sent the message, thus providing proof of their actions. Option A, Integrity, refers to the accuracy and trustworthiness of the data, while B, Confidentiality, pertains to the protection of information from unauthorized access. Option C, Authentication, verifies the identity of the sender but does not provide proof of sending a specific message.