Can YOU Solve the 'Hardest Puzzle in the World'?

Instead of the traditional Father Christmas and reindeer image emblazoned on the front, last year Britain’s intelligence and security agency designed a card featuring a cryptographic challenge.

But more than a month since Christmas, no-one has managed to solve the tricky puzzles.

More than 30,000 have come close to cracking the code and there are just three days left to give it a final try.

The agency has even encouraged people by saying the answer is ‘not as abstract as you think’.

Begin by solving part one below. This will reveal how to proceed 

Instead of have the traditional Father Christmas and reindeer image emblazoned on the front, Britain’s intelligence and security agency designed a festive card featuring a cryptographic challenge (pictured). But a month after Christmas,  no-one has managed to solve the problem. Part one is pictured above

The puzzle, which was released on a Christmas card by GCHQ’s director, Robert Hannigan, shows a grid.

Participants have to fill it in to unveil a QR code, which is the first in a series of increasingly complex challenges.

The code can be scanned with a phone which will take participants to the next round.

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