From: ichudov@algebra.com (Igor Chudov @ home)
Date: Mon, 13 Jan 1997 09:42:45 -0800 (PST)
To: paul@fatmans.demon.co.uk
Subject: Re: encryption program
In-Reply-To: <853170082.1023956.0@fatmans.demon.co.uk>
Message-ID: <199701131737.LAA04428@manifold.algebra.com>
MIME-Version: 1.0
Content-Type: text


paul@fatmans.demon.co.uk wrote:
> 
> 
> > > * The two 'e's in the first word have different ciphertext equivalents,
> > >   so it's not a single-alphabet substitution
> > yes
> 
> Could be homophonic substitution or possibly (more probably, in my 
> estimation, polygram substitution. There is also the possibility of a 
> polyalphabetic cipher...
>  
> > I also likes "follows": "vkbcjtp" note how ll gets translated to "bc".
> > That suggest that after some encryption of each letter from the plaintext
> > there is a consecutively increasing number added.
> 
> This tends to suggest polyalphabetic substitution.

what do you mean, polyalphabetic substitution?

	- Igor.