Comment on Can you Crack It? Break this cypher, get an interview with GCHQComments−deutronium14yAccording to http://www.bbc.co.uk/news/technology-15968878 it's for GCHQ rather than MI5.−gacbaOP14yMy bad, corrected.
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According to http://www.bbc.co.uk/news/technology-15968878 it's for GCHQ rather than MI5.
My bad, corrected.