CompTIA Security+ (SY0-501) — Question 798

Which of the following AES modes of operation provide authentication? (Choose two.)

Answer options

• A. CCM
• B. CBC
• C. GCM
• D. DSA
• E. CFB

Correct answer: A, C

Explanation

CCM and GCM are both AES modes that incorporate authentication mechanisms, ensuring data integrity and authenticity. CBC and CFB do not provide authentication on their own, while DSA is not an AES mode but rather a digital signature algorithm.