No, not a guide to curious pelicans, or to pelicans which like sudoku, but rather the second part of PPs introduction to programming for cryptologists, covering how to move on from elementary frequency analysis to measure fitness of candidate decrypts in your programmes. Part 1 was published last week and Part two arrives just in time for our half term break. You can take the time to explore tetragrams, fitness and even how to build a Python script to automate cracking block transposition ciphers. How very timely!
