Polyalphabetic Cipher

Why
Polyalphabetic Ciphers allow us to create more complex ciphers that are not as easily cracked as monoalphabetic ciphers

What
Polyalphabetic ciphers take in a message and assign it to any of multiple possible messages in the ciphertext space.

Examples of Polyalphabetic Ciphers

 * Vigenere Cipher
 * Beale Cipher
 * Hill Cipher