1400s amateur crypto and human puzzle tendencies

[bi3mw]

If one assumes that the VMS was encoded using known methods of the early 15th century, then the mystery would certainly have been solved long ago. It is more likely that instead of an (essentially) simple substitution, a fundamentally different, "innovative" system was used. That one could also deal "creatively" with the text composition, Ramon LLull proved with his Ars Brevis ( 1308 ) / Ars Magna already before. One can argue about the sense of such constructs, but it worked. So it is quite conceivable that with a combinatorial, logical "machine" coded text was generated, which was simply ahead of its time in the production. Perhaps the method is not so complicated, but it certainly does not correspond to today's encryption systems.
It is also conceivable that for decryption, unlike today, an active participation of the reader is necessary ( interpretation ), so the "machine" does not work by itself, if you know the rules.