A single leaked hint exposed the CIA’s most puzzling code. But dozens of the world’s toughest ciphers are still waiting to be ...

The final cipher of Lies of P: Overture, the Frosted Cipher, is the most difficult of the puzzles to solve. However, those who want to find all the clues about the truth behind the Alchemists and ...

The Zodiac Killer continues to haunt the Bay Area nearly half a century after the height of the serial killer's murderous spree. And while authorities have never apprehended the murderer who claimed ...

The Himalayas as a short area in Indiana Jones and the Great Circle. Here there aren’t any mysteries to solve, ruins to explore, or safes to open. Instead, you’ll be making your way through a ...

The expert cryptanalyst and the Sunday-puzzle expert alike rely on the fact that letters have their own personalities. As David Kahn writes: “To the casual observer, they may look as alike as troops ...