The most common causes of this issue are: Even George Washington sent secret messages to his troops and commanders.Your IP address has been temporarily blocked due to a large number of HTTP requests. This ensured that information would remain secret if the messages were intercepted or stolen. In ancient times when important documents and military commands were carried on foot by messenger, kings and rulers would encrypt the letters they sent to troops and allies. Sadly, these diplomatic messages did not provide specific military information, so the United States had no advance knowledge of the planned Pearl Harbor attack on December 7, 1941.Īlthough cryptology played a key role in World War II, it had been used for centuries before then. Army and Navy could read diplomatic Japanese messages between Tokyo and embassies in London, Washington, Berlin and Rome. The Allies gave a special code name to information from decrypted Enigma messages: “ULTRA."Ĭryptologists also unlocked secret Japanese codes. In the 1930s, a German traitor gave information to the Allies, which Polish cryptologists used to copy the Enigma machine and solve its letter-scrambling patterns. The Allies eventually cracked the German code, thanks to the work of Polish and British mathematicians. During World War II, the Germans invented a special machine called "Enigma" to encode their secret messages. To prevent the enemy from intercepting information, plans and orders were transmitted using secret codes. If enemy forces intercepted a message, they would have time to prepare for an attack. Unfortunately, radio messages could be intercepted. In World War II, military leaders used wireless radio communication to pass military messages to troops all over the world.
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