Skip to main content
The National Cipher Challenge

The mystery of the silver bullet

Latest News

12th September by Harry

The new registration system…

10th September by Harry

Welcome…

20th November by Harry

Last chance to submit Challenge 5

19th November by Harry

GCHQ Puzzle Fun

18th November by Harry

A visionary cipher

17th November by Harry

A coffee time diversion

15th November by Harry

Something a little different

14th November by Harry

How did you get on?
Go to news

Report a problem