Certified Ethical Hacker (CEH) — Question 55

Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Which of the following is the correct bit size of the Diffie-Hellman
(DH) group 5?

Answer options

• A. 768 bit key
• B. 1025 bit key
• C. 1536 bit key
• D. 2048 bit key

Correct answer: C

Explanation

The correct answer is C, as Diffie-Hellman group 5 specifically utilizes a 1536 bit key, which provides a higher level of security compared to the other options. Options A, B, and D represent different key sizes that do not correspond to group 5, with A and B being too small and D being larger than necessary for this specific group.