SY0-301 Question #146: Real Exam Question with Answer & Explanation

The correct answer is A: AES. AES (Advanced Encryption Standard) supports three key lengths: 128-bit, 192-bit, and 256-bit, giving it flexibility in balancing performance versus security. DES (B) is fixed at a 56-bit key. SHA-1 (C) is a hashing algorithm with a fixed 160-bit output - not an encryption cipher

Question

Which of the following can be implemented with multiple bit strength?

Options

AAES
BDES
CSHA-1
DMD5
EMD4

Explanation

AES (Advanced Encryption Standard) supports three key lengths: 128-bit, 192-bit, and 256-bit, giving it flexibility in balancing performance versus security. DES (B) is fixed at a 56-bit key. SHA-1 (C) is a hashing algorithm with a fixed 160-bit output - not an encryption cipher with selectable key sizes. MD5 (D) and MD4 (E) are also hashing algorithms with fixed 128-bit outputs. Only AES among these options supports multiple bit strengths.

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