A top secret science projectPlain: HELLO Cipher: EBIIL In order to decode your message, you need to share the “key” (the number 3) with your friend. After that you can send messages that are ...

The value is the cipher key. For example, the code IBDLBEBZ is encrypted with a Caesar Cipher. It doesn’t take very much to see that a shift of “1” would reveal HACKADAY.

If you have to write down a password, or some other sensitive information, you can use a Caesar Cipher to quickly encode and decode that message on your own.