Entering ciphertext transforms it back into readable plaintext. If plain text is entered, the illuminated letters are the encoded ciphertext. In typical use, one person enters text on the Enigma's keyboard and another person writes down which of the 26 lights above the keyboard illuminated at each key press. The Enigma has an electromechanical rotor mechanism that scrambles the 26 letters of the alphabet. The Enigma machine was considered so secure that it was used to encipher the most top-secret messages.
It was employed extensively by Nazi Germany during World War II, in all branches of the German military.
The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect commercial, diplomatic, and military communication.
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