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The National Cipher Challenge

The clock is ticking …

How are you getting on with Challenge 4? We hope you are managing it and that the Case Files we released yesterday were hopeful. There is another update there this morning, so head over for some help before the final deadline at 11pm tonight!

Before I go you might have noticed a badge at the top left of the site when you visited it this morning that looks like this. You should click on that to read more!

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