Certified Ethical Hacker (CEH v13) — Question 181

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, Key stretching, refers to techniques that enhance the security of weak keys by making them more resistant to brute-force attacks. Public key infrastructure is a framework for managing public keys and does not directly enhance key security. Key derivation function is a broader term, while key reinstallation is not relevant to improving key security.