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[07 May 2004|01:53pm]

heh. just saw this on heyjana's info. i thought "hey, i know what that is" and apparently, this is the ocmmunity for me, judging fromt he description.

just thought i'd say hi, for now...
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[22 Feb 2004|04:15am]


I've received a postcard with a code on it, and I have no idea how to go about breaking it. The sender has kindly grouped the numbers (all between 1 and 27) in groups of 3 (i.e. the card begins (16, 14, 4)) - does this ring a bell to anyone?

I don't think its a simple substitution cipher; it wouldn't make sense to shift to numbers and then put them in groups of three. I was thinking it may be a variant on the Playfair Cipher, in that if instead of using a 5x5 square you used a 3x3x3 cube, you'd then have 27 blocks total, but I still don't understand why she would shift into numbers; the playfair cipher works fine on letters only.

I just don't know of any ciphers that use 3-number chunks. Help appreciated!

- Wren
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[22 Sep 2001|01:16pm]

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The "unbreakable cipher" (?) [05 Jul 2001|02:07pm]

In 1989, I invented what I believe to be the world's only unbreakable cipher.

Rather than assume everyone knows what that means, let me explain the difference between a code and a cipher...

A code requires a "key" similar to a dictionary, since every word in the code equals another word:

apple = john
britney = is
doodoo = home
puck = now

So if one receives the message "apple britney doodoo puck", he gets out his code book, looks up the words and finds that the message means "john is home now".

The problem with codes is the existence of a code book; it can be found and used to decode the message.

A cipher exchanges characters for characters, rather than words for words; with 26 characters in the english alphabet, a cipher is easy to memorize, and therefore no code book needs to exist.

The problem is that ciphers can be broken with the use of a "frequency table" - the most frequently-occurring letter in the english language is e, then t, then a, o, n, r, i, s, h

Let's say you find a ciphered message where the most frequently occurring character is "m" and the second most-frequently occurring is d - you'll notice several words all through the text that look like: "dxm".

That's because, in this hypothetical cipher, d=t and m=e; so now, because of the word "the", you have the "t", the "h" and the "e".

Looking for words like "a", "and" "of" "is" etc. helps you quickly decipher the rest.

So there's the problem with ciphers: while there's no code book to be found, a cipher can be broken with a pencil and paper in just a few minutes.

Until now (i think/hope).

I'll be posting chunks of my cipher, and I would invite anyone to try to decipher it, or to point me in the direction of a resource that prides itself on being able to break ciphers.
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