Encryption is the process of converting information or data into a code, especially to prevent unauthorized access.
Decryption is the process of taking encoded or encrypted text or other data and converting it back into text that you or the computer can read and understand.
A cipher is any method of 'Encrypting' text. It is also sometimes used to refer to the encrypted text message itself, although here the term ciphertext is preferred.
Here is an encrypted message (ciphertext): MAX BGLBWX PAXXE XGVKRIML, MAX HNMLBWX PAXXE WXVKRIML.
See if you can decrypt it using the wheel below
Create an encrypted message (ciphertext): using the wheel below