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 ...

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's code was a homophonic substitution cipher, where large areas of text was replaced with symbols. Dr Blake added that the Zodiac Killer made it even harder to solve by not writing the ...