From: Adamsc@io-online.com (Adamsc)
Date: Wed, 21 Aug 1996 17:25:25 +0800
To: "cypherpunks" <cypherpunks@toad.com>
Subject: Fwd: Re: No Subject - Lesson in cracking (cryptoanalysis 001)
Message-ID: <19960821071500515.AAA190@IO-ONLINE.COM>
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>From: "Chris Adams" <adamsc@io-online.com>
>To: "Scottauge@aol.com" <Scottauge@aol.com>
>Date: Wed, 21 Aug 96 00:14:19 -0800
>Reply-To: "Chris Adams" <adamsc@io-online.com>
>Priority: Normal
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>Subject: Re: No Subject - Lesson in cracking (cryptoanalysis 001)
>

On Mon, 19 Aug 1996 19:34:07 -0400, Scottauge@aol.com wrote:

>In a message dated 96-08-19 05:44:34 EDT, you write:
>> SAMPLE MESSAGE: ("HAIL ERIS")
>"e" is a very popular letter, so is t and s.  Collect enough cypher text and
>ya just match frequency to frequency - a high number of 6's are replaced with
>an e, and so on down the line.

>Now we just start chunking up the peices according to spelling rules we know
>about - then with the help of a handy dandy spell checker like thing, when we
>get close to a word, we clump the chunks together.

>Actually, mixing your letters around helps cuz one needs to do a lot of
>shuffling here - but believe me, algorithms are out there.  Plus, the more
>cipher text you provide, the easier it is to nab your info cuz there is >more
>information for the particular algorithm I'm thinking of to work with.

Okay wise guy.  I'm going to give you a 14300 character string that
starts
out
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEETTTTTTTTTTTTTTTTTTTTTTTTTTT

TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO. . .

How are you going to tell *what* I was talking about?  I guaruntee with
any message of practical length (i.e. not " ckosuuy") will have multiple
possibilities, particularly when you take things like mispellings,
software artifacts ("----- BEGIN PGP --------" "X-Received ..." etc.) and
deliberate attempts to throw you off.  That's why it's unbreakable - by
anyone!

|Home: Chris Adams <adamsc@io-online.com> |
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|Home: Chris Adams <adamsc@io-online.com> | http://www.io-online.com/adamsc/adamsc.htp
|Autoresponder: send email w/subject of "send resume" or "send PGPKEY"
|Work: cadams@acucobol.com | V.M. (619)515-4894 | (619)689-6579
| Member in good standing of the GNU whirled hors d'oeuvre