Which of the following ciphers is a subset of the Vignere polyalphabetic cipher?

A.
Caesar

B.
Jefferson

C.
Alberti

D.
SIGABA

Explanation:
“The Caesar Cipher,…., is a simple substitution cipher that involves shifting the
alphabet three positions to the right. The Caesar Cipher is a subset of the Vigenere polyalphabetic
cipher. In the Caesar cipher, the message’s characters and repetitions of the key are added
together, modulo 26. In modulo 26, the letters A to Z of the alphabet are given a value of 0 to 25,
respectively.”
Pg. 189 Krutz: The CISSP Prep Guide: Gold Edition