Ahead of Christmas, GCHQ
stepped up its recruitment efforts released a complex series of cryptographic puzzles, which the agency invited members of the public to solve before the end of January. Unfortunately, with the deadline now behind us, the spies have revealed that not one hopeful managed to complete all five challenges.
I was stumped by the first stage, which comprised a grid-shading puzzle (below), which -- when completed correctly -- would unlock puzzle two. This then led to the third challenge, and so on and so on. Over half a million people are believed to have thrown their names into the hat, with only 30,000 making it to the final stage.
GCHQ will reveal all in early February. [Register]