Thousands baffled as GCHQ's Christmas puzzle deadline looms

Name: Thousands baffled as GCHQ's Christmas puzzle deadline looms
Uploaded: 2016-01-28T23:24:06.000Z
Duration: 2 min 3 s
Description: It is more than a month since the director of the government's intelligence service, GCHQ, came up with a rather tricky set of questions for the public as a bit of Christmas fun.

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It is more than a month since the director of the government's intelligence service, GCHQ, came up with a rather tricky set of questions for the public as a bit of Christmas fun.

With just a few days to the deadline, more than 600,000 people have started the quiz, but no one has managed to get full marks.

Our security correspondent Gordon Corera has been taking a look.

28 January 2016