Voynich is encrypted ENOCH

[Rafal]

My point was only to observe why the "Book of Enoch" was attributed to Enoch.

Sure. It is actually a well known trick called pseudoepigraphy. See the Wikipedia article for nuances.
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By the way, in the past people didn't see pseudoepigraphy as some blatant lie. Imagine that some rabbi writes a text which claims that it is written by Moses. By accident he gets caught red-handed. 
He would easily get away with it, claiming that the spirit of Moses was speaking though him, and there is nothing in the text that Moses wouldn't say, so he could actually say it, so we can call it words of Moses   Or use similar "talmudic logic".