Positional Mimic Cipher (PM-Cipher)

[oshfdk]

The cipher is letter-by-letter at fixed positions, so word lengths and total length are preserved. If you feed it 10000 Latin letters, you get 10000 cipher glyphs (same number of words, same per-word length).

In your first post "ber" was encoded as "qoak" and "liber" as "chedys". Unless you remap "qo" and "ch" to a single glyph somewhere downstream, I assume the ciphertext should be longer than the plaintext? To put it differently, when you compute the entropy of the encoded text, do you count "qo" and "ch" as a single glyph or as a pair of glyphs?

Computing entropy with residuals doesn’t really apply (under my opinion). Residuals aren’t part of the ciphertext; they’re the little side notes that tell you which original token a shared glyph stood for.

I'm not sure I understand the reasoning here. From my point of view computing the entropy with the residual is a perfect metric to understand exactly how much entropy is offloaded to the residuals.