With this fun challenge, brought to you in partnership with the Science Museum Group, you and your child can learn how to make a cipher wheel together and use it to send secret messages to one ...

Hagelin B-21; the beginning of the Hagelin pin wheel machines, superficially resembling the Enigma; developed by Boris Hagelin based on Arvid Gerhard Damm's patented design of the B-18; it has two pin ...

Led by the brilliant Alan Turing, inventor of the computer, the codebreakers of England's cipher-cracking organization ... which is why the wheels of the Enigma machine were designed to move ...

Photo: A four-rotor German Enigma cipher machine made during WW2 ... then scramble it by using three to five notched wheels, or rotors, which displayed different letters of the alphabet.