Ceaser Cipher

Ceaser Cipher is an earliest known technique for encrypting text.
Based on the cipher factor the characters are shifted by that much.
It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.

For Example
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

cipherd by 3 will be

D E F G H I J K L M N O P Q R S T U V W X Y Z A B C