Led by the brilliant Alan Turing, inventor of the computer, the codebreakers of England's cipher-cracking organization, Bletchley Park, were mathematicians, crossword-puzzle fanatics, and other ...

Fancy yourself as an expert codebreaker or cyber sleuth ... workforce keep their minds sharp by creating and solving devious puzzles. To mark its 100th anniversary, the intelligence agency ...

CLUE: The key to unlocking the puzzle is identifying Samuel ... you can join the social media conversation on the GCHQ code-breaker challenge using hashtag #GCHQpuzzlebook.

One of the successful stocking-fillers of last Christmas was the GCHQ puzzle book, which allowed mere mortals to wrestle with fiendish conundrums produced by the folk at the intelligence and ...