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grue

Any cryptography nerds?

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I've got a copy of Applied Cryptography on my desk, but I've got signature display turned off. Makes this site much easier on the eye...




9.20.23.10.14.8.22.24.8.17.7.5.9.2.1.13.2.2.24.25.13.2.13.6.11.1.13.24.15.1.



There ya go :)
cavete terrae.

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heh someone played this game at my job. after I decrypted the original message I "encrypted" a reply out of truly random data. had people scratching their heads for weeks :)

My advice is to do what your parents did; get a job, sir. The bums will always lose. Do you hear me, Lebowski?

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9.20.23.10.14.8.22.24.8.17.7.5.9.2.1.13.2.2.24.25.13.2.13.6.11.1.13.24.15.1.
There ya go :)



Itwjnhvxhqgeibambbxyqbmfkamxoa

Thought maybe it had something to do with the sequence of the alphabet since there wasn't a number higher than 26. I hope you don't want to me rearange that into what the sig is supposed to be.
I swear you must have footprints on the back of your helmet - chicagoskydiver
My God has a bigger dick than your god -George Carlin

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Unless it's the longest word around, it's going to be hard without word breaks.



"Easy" is with space breaks for words.
"More realistic" and more difficult are simply long strings of numbers or letters, usually broken into groups of 5 to make transmission easier, but also acceptable as simply one long string.
quade -
The World's Most Boring Skydiver

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C'mon, give us a hint. Is it a substitution cypher?



Ummm...... can you name one that isn't?



But there are many, MANY, ways of creating a substitution cypher. The simplist is the "Caesar Cypher" where every instance of a character (or in this case a number) directly represents a single letter, but it could just as easily be a polyalphabetic cypher where the key is rotated each time it's used and each number could represent any one of a number of letters depending upon its placement in the message.

And who said it was a cypher anyway? It might be a code. For instance, each number could represent a word in a book.

The sample size provided here would make either of those, however, nearly unbreakable, so I'm going to assume that it is a Ceasar cypher.

Unfortunately, I don't have time to work on this at the moment.
quade -
The World's Most Boring Skydiver

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C'mon, give us a hint. Is it a substitution cypher?



Ummm...... can you name one that isn't?



I wrote one last week that was actually a series of pointers to words, not letters. They were pointers because each set of numbers was a reference to a page, line, and word position in a specific book. The book or key was defined by the only 13-digit reference in the code. Without that piece of information, it was just a jumble.

Yes, many are not simple substitution ciphers. Here's a reference that'll keep you busy. http://www.cryptogram.org/cipher_types.html.

Big smile.
SCR #14809

"our attitude is the thing most capable of keeping us safe"
(look, grab, look, grab, peel, punch, punch, arch)

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And who said it was a cypher anyway? It might be a code. For instance, each number could represent a word in a book.



That's funny as hell...I was writing my reply above at the same time you were writing this. Small world...encoded, but small.
SCR #14809

"our attitude is the thing most capable of keeping us safe"
(look, grab, look, grab, peel, punch, punch, arch)

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I wrote one last week that was actually a series of pointers to words, not letters. They were pointers because each set of numbers was a reference to a page, line, and word position in a specific book. The book or key was defined by the only 13-digit reference in the code. Without that piece of information, it was just a jumble.



Care to expand on how that isn't substitution?

Simple.... no.

Substitution.... yes

Random transposition is still substitution.
Owned by Remi #?

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Care to expand on how that isn't substitution?

Simple.... no.

Substitution.... yes

Random transposition is still substitution.



It's a substitution, but not a substitution cypher.

It's a semantic difference to crypto geeks.

A cypher refers to a direct substitution of character for character.
A code refers to a character (or characters) indicating a word in a table.
quade -
The World's Most Boring Skydiver

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The simplist is the "Caesar Cypher"



Yeah, like when Orphan Annie told Ralphie to be sure to drink his Ovaltine.



Exactly.

Now, if the word "drink" actually meant "kill" and "Ovaltine" meant "enemy" that would be an example of a code.
quade -
The World's Most Boring Skydiver

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Judging by the range of numbers it's probably a substitution cipher of some kind but it's too short to do any meaningful frequency analysis. It's not a simple Caesar Cipher so maybe it has a non-constant shift for each letter in the sequence. It doesn't appear to be a y=mx+c shift either although I've not run through all the permutations of that. The next step would be a Vigenère cipher but that would mean guessing the key word (I tried all the skydiving/grue related words I could think of) or brute force to go any further and I can't be bothered.

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Only one thing in the world could've dragged me away from the soft glow of electric sex gleaming in the window.
Stupidity if left untreated is self-correcting
If ya can't be good, look good, if that fails, make 'em laugh.

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