Clearly, many scientists have considered that bacteria using manganese for energy might be responsible, but evidence supporting this idea was not available until now. There is a whole set of environmental engineering literature on drinking-water-distribution systems getting clogged by manganese oxides, but how and for what reason such material is generated there has remained an enigma. Without the spiritual world the material world is a disheartening enigma. The reactions in which diamonds occur still remain an enigma. which human ingenuity may not, by proper application, resolve. It may well be doubted whether human ingenuity can construct an enigma. Many commentators say the flow of Ultra communications intelligence from the decrypting of Enigma, Lorenz, and other ciphers shortened the war substantially and may even have altered its outcome. Poland's sharing of her achievements enabled the western Allies to exploit Enigma-enciphered messages as a major source of intelligence. While Nazi Germany introduced a series of improvements to the Enigma over the years, and these hampered decryption efforts, they did not prevent Poland from cracking the machine as early as December 1932 and reading messages prior to and into the war. The receiving station would have to know and use the exact settings employed by the transmitting station to successfully decrypt a message. The security of the system depends on machine settings that were generally changed daily, based on secret key lists distributed in advance, and on other settings that were changed for each message. The rotor mechanism changes the electrical connections between the keys and the lights with each keypress. Entering ciphertext transforms it back into readable plaintext. If plain text is entered, the illuminated letters are the 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 machine was considered so secure that it was used to encipher the most top-secret messages.The Enigma has an electromechanical rotor mechanism that scrambles the 26 letters of the alphabet. 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. Wikipedia Rate this definition: 0.0 / 0 votes
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