SY0-301 Question #180: Real Exam Question with Answer & Explanation

The correct answer is B: 3DES. 3DES (Triple Data Encryption Standard) works by applying the original DES cipher three times in sequence using multiple keys - typically in an Encrypt-Decrypt-Encrypt (EDE) pattern with two or three independent 56-bit keys, effectively producing 112 or 168 bits of key strength. T

Question

Which of the following provides additional encryption strength by repeating the encryption process with additional keys?

Options

AAES
B3DES
CTwoFish
DBlowfish

Explanation

3DES (Triple Data Encryption Standard) works by applying the original DES cipher three times in sequence using multiple keys - typically in an Encrypt-Decrypt-Encrypt (EDE) pattern with two or three independent 56-bit keys, effectively producing 112 or 168 bits of key strength. This design was created to extend the lifespan of DES when its 56-bit key was found to be too weak. AES is a distinct, single-pass algorithm with its own key schedule. TwoFish and Blowfish are independent block cipher designs that do not work by repeating a previous cipher's process with additional keys.

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