Which of the following is BEST at defeating frequency analysis?
A.
Substitution cipher
B.
Polyalphabetic cipher
C.
Transposition cipher
D.
Ceasar cipher
Explanation:
A polyalphabetic cipher makes use of more than one alphabet to conquer frequency analysis.
Incorrect Answers:
A, C: Substitution and transposition ciphers are susceptible to attacks that perform frequency analysis.
D: The Ceasar Cipher is a type of substitution cipher.Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 780, 781, 871