Post by zaphod73491 on Dec 11, 2020 22:19:44 GMT -5
Hi Jenny: it's all over the national news tonight, though with only sketchy information about the cipher's methodology. I worked Z-340 hard about 5 years ago, writing a homophonic cipher-decoder to try to crack it. Never got anywhere, and now it's easy to see why: the cipher ALSO employed transposition. I never considered that possibility because it seemed like tremendous overkill for a homophonic cipher. I'll be curious to see if my solver would have found the solution if I also allowed for regular transpositions. With 340 symbols, a 17x20 grid (or 20x17) would be where I would have started, followed by 10x34/34x10, 5x68/68x5, 4x85/85x4, etc. Even with the correct grid dimensions, there are dozens of "regular" ways to transpose the letters: horizontally, vertically, oxplow vertical, oxplow horizontal, diagonals and spirals.