Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 430

Which type of algorithm provides the highest level of protection against brute-force attacks?

Answer options

• A. PFS
• B. MD5
• C. HMAC
• D. SHA

Correct answer: A

Explanation

The correct answer is PFS (Perfect Forward Secrecy), as it ensures that session keys are not compromised even if the private key is exposed, providing robust protection against brute-force attacks. MD5 is considered weak and vulnerable to collisions, while HMAC and SHA, though secure, do not offer the same level of protection against brute-force due to their deterministic nature.