What is a Monoalphabetic Cipher?
Monoalphabetic Substitution Ciphers, to give them their full name, are the simplest type of ciphers known. Substitution means that each character in the plaintext message is replaced by another character in order to produce the ciphertext message. The ciphertext character can be anything at all: a squiggle or a diagram, a sequence of dots or, most commonly, a letter of the alphabet. These ciphers are called monoalphabetic because they literally use only a single alphabet, so if the plaintext letter ‘E’ is substituted with the ciphertext letter ‘R’ then every single instance of ‘E’ in the plaintext will equate to an ‘R’ in the ciphertext. Morse Code is a MSC type cipher, why it was called a code is unknown.The Julius Caesar Cipher The Julius Caesar Cipher is the most commonly known MSC. It uses two complete alphabets with one shifted a certain number of places relative to the other. The classical example shifts the alphabets by three places in total. This means that the plaintext letter
