The Caesar Cipher is one of the most basic methods for encrypting and decrypting a text. The method is named after Julius Caesar (55BC) and is a substitution cipher in which each letter of the plaintext is shifted up or down the alphabet by a fixed number of positions. The method is also known as Caesar's Cipher, Caesar's Code, Caesar Shift and Shift Cipher. Julius Caesar, who used it in his private correspondence, shifted each letter of the plaintext down by 3 positions.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
X Y Z A B C D E F G H I J K L M N O P Q R S T U V W
In this case, The letter D becomes an A, E becomes B, etc. At the receiving end, all the recipient has to do, is shift each letter by the same fixed number in reverse direction. This means that A becomes D, B becomes E, etc. For this reason, the cipher is sometimes called a 'shift cipher' or a 'rotation', in which case the Caesar Cipher is identified as ROT3 (rotation by 3 positions).
Great news! About the name, well, the third time's the charm, but... scary version: it could be the name of some other member here. Actually, any of us (like Boris or Charles). Wonder what the "winner" gets? A permaban probably .