Certified Information Systems Auditor (CISA) — Question 1421

Which of the following is the PRIMARY reason for using a digital signature?

Answer options

• A. Authenticate the sender of a message
• B. Provide confidentiality to the transmission
• C. Verify the integrity of the data and the identity of the recipient
• D. Provide availability to the transmission

Correct answer: A

Explanation

The primary purpose of a digital signature is to authenticate the sender of a message, ensuring that the recipient can trust the origin of the message. While confidentiality, integrity, and availability are important aspects of data transmission, they are not the main function of a digital signature.