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
Caesar Cipher is Monoalphabetic cipher;
Alberti cipher disk is polyalphabetic cipher;
Jefferson’s wheel cipher is polyalphabetic cipher;
SIGABA is a machine similar to Enigma.
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