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 ...

How a ‘gigantic’ mistake scrambled the sale of the ‘Kryptos’ secret code

But thanks to what Sanborn now calls a “monstrous mistake,” just weeks later, Kobek and his friend Richard Byrne revealed they found the plaintext answer to K4 in a public archive — shocking the ...