Which of the following ciphers uses a polyalphabetic substitution process?
A.
Caesar cipher
B.
Simple substitution
C.
Vigenere
D.
ATBASH
Explanation:
Vigenere is a polyalphabetic substitution cipher created by Blaise de
Vigenere in the 16th century. Polyalphabetic substitution uses multiple alphabets
which makes the algorithm more immune to frequency analysis attacks.