Reply To: Challenge 10B
@Geo_addict
You could assume one of your conjectures to be true and then experiment on a section of ciphertext and see if the output leads to something implausible, bit like a proof by contradiction. I’ve found that ruling things out as a way of making progress worked better than trying to find the key and solving it all at once. Each discarded hypothesis shrinks the space even if no key has been found yet, and once you narrow down enough options, you can then write a programming script to test out the final few possibilities and more or less brute force it. Writing some things down on some squared paper might be helpful!