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. Here’s what you’ll learn in this story: Last month, two journalists decoded part of the famous Kryptos sculpture in front of the CIA building. It’s the latest news in the cryptography world, as ciphers continue to attract code crackers in the CIA—and beyond. The Beale Cipher has attracted perhaps the most decryption enthusiasts of all time. Tens of thousands of people have tried to solve it, to get to the supposed location of a massive treasure. ========================================================================...