Certified Information Systems Auditor (CISA) — Question 1193

Which of the following can only be provided by asymmetric encryption?

Answer options

• A. Information privacy
• B. Data availability
• C. 256-bit key length
• D. Nonrepudiation

Correct answer: D

Explanation

Nonrepudiation is a key feature of asymmetric encryption, as it ensures that a sender cannot deny having sent a message due to the use of public and private keys. Information privacy and data availability can be achieved through other means and are not exclusive to asymmetric encryption. Additionally, 256-bit key length refers to the strength of encryption rather than a unique feature of asymmetric encryption.