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This is the full card, which you'll need in order to solve the puzzle. If you love testing your mind, then it’s the perfect time of year - the annual GCHQ Christmas quiz and the answers have been ...

GCHQ, the UK’s intelligence agency, released its annual Christmas card on Wednesday, filled with puzzles and hidden codes. The spy agency's "Chief Puzzler", known as "Colin", said the notoriously ...

LONDON — What does a spy agency give for Christmas? How about a riddle wrapped in an enigma inside a mystery. GCHQ, Britain’s electronic and cyber-intelligence agency, on Wednesday, published its ...

More than 500 schoolchildren took part in a competition to design the cover of the card. They were asked: “What do you think GCHQ looks like on Christmas Day?”, with the additional task of including ...

Fans of codebreaking, maths and brainteasers can now try their hand at the latest cryptic Christmas challenge set by GCHQ, the UK's intelligence agency. GCHQ released its annual Christmas card on ...

If you fancy yourself as a budding sleuth, hacker or code-breaker, GCHQ has released its annual Christmas challenge and is encouraging people to try and crack the puzzle. Featuring designs from ...