from the rated-e-for-enigma dept.
Spudley writes "I just heard on the BBC that the British Government's not-so-secret code breaking organisation, GCHQ, has launched a little Christmas crypto challenge for all you budding secret agents. Should be fun to try it out... even if you're not brave enough to actually send in an entry."
As far as the laws of mathematics refer to reality, they are not
certain, and as far as they are certain, they do not refer to reality.
-- Albert Einstein