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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 X-Mailer: Chris Adams's Registered PMMail 1.52 For OS/2 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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> | 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 ===================END FORWARDED MESSAGE=================== |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