The Unwritten Rules of Spycraft

Even the most brilliant code is useless if someone catches you handing the note to your friend. Real operatives never swap secrets face-to-face. Instead, they use a dead drop—a pre-selected hiding spot like a hollow tree. You hide the note, leave, and your partner picks it up later.

To pull this off, you must follow the unwritten rules of tradecraft. First, agree on your hiding spot and your cipher key in person before you need them. Second, keep your messages short. Third, never, ever hide your key in the same spot as your encrypted note!

How does your partner know a message is waiting? You leave a signpost. It could be a piece of tape on your locker or a specific book on your desk. Once they see the signal, they know to check the drop spot alone.

But the absolute most important rule of operational security isn't about hiding things—it's about why you write them. Secret codes are for solving mysteries and sharing jokes. They are never for being mean or leaving classmates out. In real spycraft, kindness is your best disguise.