Certified Information Systems Security Professional (CISSP) — Question 397

Which of the following is the PRIMARY type of cryptography required to support non-repudiation of a digitally signed document?

Answer options

• A. Hashing
• B. Message digest (MD)
• C. Symmetric
• D. Asymmetric

Correct answer: D

Explanation

The correct answer is D, Asymmetric, because it utilizes a pair of keys (public and private) to create a digital signature that ensures non-repudiation. The other options, such as A (Hashing) and B (Message digest), do not provide the necessary key pair for this purpose, while C (Symmetric) uses a single key, which does not support non-repudiation.