Certified Information Security Manager (CISM) — Question 106

Which of the following is the MOST effective way to protect the authenticity of data in transit?

Answer options

• A. Digital signature
• B. Hash value
• C. Private key
• D. Public key

Correct answer: A

Explanation

A digital signature is the best option for verifying the authenticity of data in transit because it provides a way to ensure that the data has not been altered and confirms the identity of the sender. A hash value only ensures data integrity but does not validate the sender's identity, while private and public keys are used for encryption rather than directly protecting data authenticity.