Certified Information Systems Security Professional (CISSP) — Question 370

Which of the following is required to verify the authenticity of a digitally signed document?

Answer options

• A. Agreed upon shared secret
• B. Digital hash of the signed document
• C. Recipient's public key
• D. Sender's private key

Correct answer: B

Explanation

The correct answer is B, as a digital hash is essential for verifying that the document has not been altered since it was signed. The other options do not provide the necessary validation; an agreed upon shared secret is not used in digital signatures, and while the recipient's public key is involved in the process, it does not directly verify the document's authenticity.