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The Uk Intelligence agency, GCHQ, based in Cheltenham, has put some code online in the hope of finding new talent.
Anyone who breaks the code will be taken through to their recruitment website and invited to apply for a job.
The agency say they aren't worried about the answer being spread around the internet, though anyone who has been in trouble for hacking in the past won't be eligible for work.
You can have a go at cracking the code by CLICKING HERE.