The first Enigma machine was discovered by Arthur Scherbius, German engineer who acquired the patent in 1918. Name of this device originated from Greek word - riddle. It was used commercially from the early 1920s, and was also adopted by the military and governmental services of a number of nations — most famously German Army. Communication during those days was sent over radio which means that everyone could easily listen. But at that moment no one could spy on Nazi messages - Scherbius' Enigma provided them with the strongest cryptographic cipher of the world.