Thursday 23 March 2017

GCHQ Christmas card features 'cryptographic challenge'

The GCHQ Christmas card features a cryptographic challenge
The GCHQ Christmas card features a cryptographic challenge

GCHQ has released a head-scratching Christmas card to keep puzzle fans busy over the holidays.

Instead of the traditional Santa and reindeer, Britain's intelligence and security agency has designed a festive card featuring a cryptographic challenge.

Participants have to fill in a grid-shading puzzle to unveil a picture, which is the first in a series of increasingly complex challenges.

The competition will also raise funds for the NSPCC, with the winner to be announced after January 31 2016.

GCHQ said: "In his Christmas card this year, director GCHQ Robert Hannigan has included a cryptographic challenge that should exercise the grey matter over the festive season.

"Participants who enjoy the challenge are invited to make a donation to the NSPCC, which is the director's chosen charity this year."

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