[split] Diplomatic ciphers

[-JKP-]

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I do have other alternative ideas such as things like positional homophonic substitution .i.e. letters are represented with one unit or unit block at the start of a word and with another unit or unit block at the end of a word. If that makes any sense.

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Whether it makes sense isn't really the problem here. That's easy to understand. The problem is how it affects the statistical properties of the VMS text.

If you have a block at the beginning that represents "a" and a different block at the end that represents "a", in text like the VMS where there is already a fairly small character set (compared to substitution ciphers like the diplomatic ciphers), then you very quickly run out of characters or blocks to represent the rest of the alphabet.