Each year, starting towards the end of January, the maths department at the University of Manchester release their Alan Turing Cryptography Competition into the wild.
Much like the National Cipher Challenge it consists of multiple challenges of increasing difficulty that are released on a weekly basis, usually on Mondays.
Click the image/text below to visit and sign up. Come back to this page and let us know how you get on in the comments (no spoilers, though)!
