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Post by Jenny on Jan 23, 2020 15:39:02 GMT -5
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Post by Jenny on Dec 11, 2020 19:29:39 GMT -5
Is the 340 cipher solved:
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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.
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Post by montrapier on Feb 16, 2022 6:38:43 GMT -5
So creepy and evil, I hope these never appear in a treasure hunt!!
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Post by Jenny on May 18, 2023 14:29:39 GMT -5
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