Positional Mimic Cipher (PM-Cipher)

[oshfdk]

Let me explain: in the classical substitution ciphers one gliph = one original letter.

In the PM_cipher:

- one original leter can be represented by different glyphs, deppending on the position in the word
- AND in a word position, one gliph can correspond to multiple letters (that's why we need the residuals.

So, two ciphered words that look the same (two quokedy) don't need to correspond to the same original word, because the "qu" might be the cipher of two (or thre or four) different letters.

This makes it even slightly worse from the point of view of repeated sequences, some different plaintext sequences can map to the same ciphertext too. Unlikely to cause much difference, but the main problem remains. Each repeating phrase (like "In this section will will study the properties of") will produce the same ciphertext.