Re: VMs: Three frequency tables

["Jeff" <jeff@xxxxxxxxxxxxxxxxxxxxxx>]

Rene Zandbergen r_zandbergen@xxxxxxxxx wrote

>
> --- Jeff <jeff@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> > The polymorphic cipher will not give a letter for
> > letter substitution. Like
> > a polyalphabetic. However single substitution is not
> > used. An example.
> >
> > Take a line from the VMS.
> >
> >
> shoy.ckhey.kodaiin.cphy.cphodaiils.cthey.she.oldain.d
>
>  (description deleted)
>
> > Again all comments welcome.
>
> Two comments:
>
> 1) Thanks, this is a very clear description!
>
> 2) It describes the decryption process. I am pretty
> sure, however that the opposite process (encryption)
> cannot exist. Bear with me:
> The scribe would always be in the
> following situation: a new plaintext character
> must be encoded, and there are already two code
> characters on the papper (Vellum) to make a new
> triplet. That means that for any given (code) pair
> on the vellum there should be many different
> triplets in his tables in order to accommodate the
> many different plaintext characers to be encoded.
> However, in Voynichese the possible set of triplets
> is very restricted.

I am going to take several Italian MSs from the 1400s and 1500s and try to
encipher them.
If I get completely confused in this then I will let you know ASAP. As this
would be the situation the original scribe would have been in. I will do
this by hand to get a true feel for the method.

>
> I know that this is a qualitative analysis, but
> before pursuing this path you should be concerned
> that the encryption matching your decryption
> actually exists.
>
> A suggestion: it might be worth trying the opposite:
> the VMs was encrypted using a method that you are
> using for decryption...
>
> All the best,
>            Rene
>
>
>
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