Certified Ethical Hacker (CEH v11) — Question 350

Kevin, an encryption specialist, implemented a technique that enhances the security of keys used for encryption and authentication. Using this technique, Kevin input an initial key to an algorithm that generated an enhanced key that is resistant to brute-force attacks.
What is the technique employed by Kevin to improve the security of encryption keys?

Answer options

• A. Key stretching
• B. Public key infrastructure
• C. Key derivation function
• D. Key reinstallation

Correct answer: A

Explanation

The correct answer is A, Key stretching, which involves enhancing the security of encryption keys to make them more resistant to brute-force attacks. Options B and C refer to different concepts in cryptography that do not specifically focus on enhancing the security of keys through brute-force resistance. Option D, Key reinstallation, is unrelated to the enhancement of encryption key security.