Caesar Cipher

Caesar Cipher shifts the letter by a fixed number of places to the left or to the right.

// Shifting by 3

F: A B C D E F G H I J K L M N .....
T: D E F G H I J K L M N O P Q.....

To decrypt this, the recipient should know that it has been shifted by 3.

// Using this, Encrypt: 'CRYPTOGRAPHY'

F: C R Y P T O G R A P H Y
T: F U B S W R J U D S K B

• The Caesar Cipher uses a key between 1 and 25.

• A key of 1 shifts each letter by one position (A becomes B).

• A key of 25 shifts each letter by 25 positions (A becomes Z).

• A key of 0 or 26 results in no change (full rotation). [Key of 0: Each letter is shifted by 0 positions, meaning every letter stays the same.; Key of 26: There are 26 letters in the English alphabet. Shifting each letter by 26 positions brings it back to its original position, completing a full rotation of the alphabet.]

• The Caesar Cipher has a keyspace of 25 different keys.