Abstract: An encryption device includes a card with a grid comprising multiple rows and columns defining boxes for receiving individual characters. One of the columns or rows contains a master password or code character string. Other columns or rows contain encrypted character strings. The individual characters of the master password can be offset with respect to corresponding, individual characters of the encrypted character strings. A sleeve slidably, reciprocably receives the card and assists with aligning the characters of the master password and the characters of the encrypted character strings, which are visible through a window in the sleeve. A method of storing, encrypting and retrieving character strings utilizes the encryption device.