Certified Ethical Hacker (CEH v11) — Question 80

In this form of encryption algorithm, every individual block contains 64-bit data, and three keys are used, where each key consists of 56 bits. Which is this encryption algorithm?

Answer options

• A. IDEA
• B. Triple Data Encryption Standard
• C. AES
• D. MD5 encryption algorithm

Correct answer: B

Explanation

The correct answer is B, Triple Data Encryption Standard, as it specifically uses 64-bit blocks and three keys of 56 bits each. Option A, IDEA, uses 64-bit blocks but does not utilize three keys; option C, AES, operates with 128-bit blocks and different key sizes; option D, MD5, is a hashing algorithm and not an encryption algorithm.