The VMS as a possible chain encryption ( Mod 23 ).

[bi3mw]

For me, the question arises as to whether certain text characteristics (e.g., word repetitions or repetitions with minor variations) depend heavily on the original nature of the text or not. For example, a poem should produce a different output than a medical free text. This applies in particular to an encryption which is essentially a (deterministic) substitution.

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Not many cipher types would cover all of these.

What kind of encryption could possibly fulfill all these conditions in one go?