Monoalphabets

Monoalphabetic cipher is also known as “The Caesar Cipher.” This system was described in biography of Caesar by Suetonius and by Caesar himself. This type of cipher uses fixed substitutions over an entire message. With this you can make an enormous amount of modes of encryption. “There are over 400,000,000,000,000,000,000,000,000 such rearrangements, which gives rise to an equivalent number of distinct cipher alphabets.”
 An example is shown in the website: http://people.eku.edu/styere/Encrypt/monoalphabetic.html