Learn to use the cipher utility with confidence. This Daily Drill Down walks you through using every cipher switch and shows you exactly what happens in the real world when you use these switches.
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This Unbreakable CIA Cipher Fooled the World for 37 Years. Then Two People Accidentally Solved It.
A single leaked hint exposed the CIA’s most puzzling code. But dozens of the world’s toughest ciphers are still waiting to be solved.
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