The Voynich manuscript has long been shorthand for the unsolved and the unknowable, a late medieval codex filled with looping ...

The Playfair cipher is an incredibLe code system that is both difficult to decrypt without a computer and easily solvable by hand. You might be familiar with the Cryptoquip in the comics section of a ...

LAST Christmas, Penguin published The GCHQ Puzzle Book, a collection of fiendish puzzles devised by Britain’s code-breakers to tease and infuriate their colleagues. As might have been expected, these ...

NBC Select independently determines what we cover and recommend. When you click on or buy through our links, we may earn a commission. Learn more. Whether it’s Legos, puzzles, or board games, I love ...