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 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 ...

Hannah handed me a piece of paper with the following string of letters. “Each letter stands for another one,” said Hannah. “Ooh, a substitution cipher!” I thought. But I was stumped. “Is this just one ...