SIGABA: The U.S. Military's Unbreakable WWII Encryption Machine 🔐

If you've watched and listened to the story of the German Enigma in World War II, that was the codebreaking story. What about the codemaking story? That is the story of the Sigaba. Its designer, Frank Rowlett, took the Enigma's weaknesses in mind and designed the perfect encryption machine that was never broken by the enemy. It was perfect the day it went on line, and was still perfect the day it was taken off line.