212-81 practice question 9 of 30

DES has a key space of what?

Full set: 206 questions
Answer options
A: 2^128
B: 2^192
C: 2^64
D: 2^56 Correct answer
Correct Answer:
D. 2^56
Explanation

2^56 https://en.wikipedia.org/wiki/Data_Encryption_Standard The Data Encryption Standard (DES) is a symmetric-key algorithm for the encryption of digital data. Although its short key length of 56 bits makes it too insecure for applications, it has been highly influential in the advancement of cryptography.

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