The Caesar Cipher

Caesar used a special cipher
to communicate with his
generals.

One of the first things we will clarify this year is the difference between a "code" and a "cipher." A cipher is a system of hiding a message where each letter of the original message (called the "plaintext") is replaced by another letter, number or symbol. A code is a system where a whole word can be replaced with another word, number or symbol.

WKLV LV RQH RI WKH ILUVW FLSKHU PHWKRGV XVHG LQ KLVWRUB. LW LV SUHWWB HDVB WR FUDFN. ZH ZLOO EH OHDUQLQJ DERXW KRZ LW LV FUDFNHG DQG KRZ LW OHG WR PRUH FRPSOLFDWHG FLSKHUV.

Oops! I seem to have accidentally written the previous paragraph using the famous Caesar cipher. Can you crack it? The diagram below and the website to the right might help.