How perfect is Voynichese?

[Mauro]

[quote="Jorge_Stolfi" pid='87381' dateline='1783649445']
[quote="Mauro" pid='87368' dateline='1783632694']A You are not allowed to view links. Register or Login to view. is not a codebook cipher. The resulting encrypted text is a random string and gives zero informations to an attacker.[quote]

Ah, so you mean a Vigenère-type cipher.  I though @JoJo was referring to a codebook-style cypher, namely a substitution cipher operating on words instead of characters.  Even if the codebook is used once and then lost or discarded, if the text is long enough...

I think that a Vigenère-type cipher is rather unlikely because it would "homogenize" the word frequencies -- instead of a "most common word" there would be multiple equally common "most common words", etc.  So it would have to be someting even more complicated than a simple Vigenère.  Seems rather unlikely for the times...

All the best, --stolfi
[/quote]

Well, one-time pads are Vigenere ciphers where the key is as long as the plaintext and truly random and  never reused. They are on a completely different planet from Vigenere's: one-time pads are unbreakable, even with infinite computer power.

Of course I'm not suggesting one-time pads have anything to do with the VMS! It was only to correct a sentence in a previous post from the OP: "anagrams + substitutions is about as safe as a one-time pad". Not even close.