Which of the following is NOT an example of a block cipher?
A.
Skipjack
B.
IDEA
C.
Blowfish
D.
RC4
Explanation:
RC4 is one of the most commonly used stream ciphers.
Incorrect Answers:
A: Skipjack is a symmetric key block cipher.
B: International Data Encryption Algorithm (IDEA) is a block cipher and runs on 64-bit blocks of data.
C: Blowfish is a block cipher that works on 64-bit blocks of data.Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 809, 810
Miller, David R, Microsoft CISSP Training Kit, O’Reilly Media, 2013, California, p. 159