The School of Mathematical Sciences at the University of Southampton warmly welcomes you to its 22nd national codebreaking competition. Whether you are new to codebreaking or to the National Cipher Challenge, or an experienced competitor

MathsBombe is aimed at students up to Year 13 (England and Wales), S6 (Scotland), Year 14 (Northern Ireland). You don't need to be a computer whizz or a mathematical genius — you just need to keep your wits about you and be good at solving puzzles!

The School Code Breaking Challenge! There are 7 code challenges you can compete in with students from across the world.

Now in its tenth year, the Alan Turing Cryptography Competition is aimed at secondary school children in the UK up to Year 11 (England and Wales), S4 (Scotland), Year 12 (Northern Ireland). You don't need to be a computer whizz or a mathematical genius — you just need to keep your wits about you and be good at solving problems!