22-05-2025, 01:47 PM
Book cipher (16th century attested, used by queen mary)
There is this encryption method where both parties have a copy of the same book.
The way you communicate is something like "pageno lineno wordno". encoding means looking through your copy of the book for the word you want to write.
Probably not what was used in the voynich, it works better after the invention of the printing press when people could more easily have exact copies of the same book. it is very easy with manual copying to get different linenumbers. Maybe with the bible that was already explicitly numbered.
There is this encryption method where both parties have a copy of the same book.
The way you communicate is something like "pageno lineno wordno". encoding means looking through your copy of the book for the word you want to write.
Probably not what was used in the voynich, it works better after the invention of the printing press when people could more easily have exact copies of the same book. it is very easy with manual copying to get different linenumbers. Maybe with the bible that was already explicitly numbered.