How the U.S. Cracked Japan's 'Purple Encryption Machine' at the Dawn of…

When one thinks about cryptography or encryption in World War II, the first thing that comes to mind is the Enigma Machine used by the Nazis, whose code was broken by the Allies and used as a secret tactical advantage. But what many people don’t know is that just before World War II, the Japanese also developed a… » 3/22/13 3:00pm 3/22/13 3:00pm