The Can you crack it? challenge, run by GCHQ, is ending soon, so here are a few hints to those trying to crack the code. I’ll try not to give too much away, but this should be a help to people who are stuck.

GCHQ recently opened a puzzle called ‘Can you crack it’, over at canyoucrackit.co.uk. The challenge is split into three stages, and here is my solution to Stage 2. The original task suggested the solution should be done with Javascript, however I decided to tackle this challenge with Haskell. The challenge is to write a Virtual Machine to [...]