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What algorithm was DES derived from?

What algorithm was DES derived from?

PrepAway - Latest Free Exam Questions & Answers

A.
Twofish.

B.
Skipjack.

C.
Brooks-Aldeman.

D.
Lucifer.

Explanation:
Lucifer was adopted and modified by the U.S. National Security Agency (NSA) to establish the U.S. Data
Encryption Standard (DES) in 1976.
Incorrect Answers:
A: Twofish is a symmetric block cipher, which was a candidate for being the basis of the Advanced Encryption
Standard (AES).
B: Skipjack is an algorithm that was used by Clipper Chip, which was used in the Escrowed Encryption
Standard (EES).
C: Brooks-Aldeman is not a valid algorithm.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 764, 809
Conrad, Eric, Seth Misenar, Joshua Feldman, CISSP Study Guide, 2nd Edition, Syngress, Waltham, 2012, p.
250


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