General > General Technical Chat
Anyone play with ciphers?
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helius:

--- Quote from: dietert1 on August 27, 2020, 05:16:24 am ---Inviting people to try and crack a DES cipher or any other serious cipher
--- End quote ---

The obfuscation applied to these files, which are used by the application software without requiring any kind of key input, are the exact opposite of a "serious cipher". They are a feel-good measure with no cryptographic protection whatsoever.
T3sl4co1l:
:-DD You're complaining about cracking DES when the quoted codes are blatantly, obviously some other chintzy thing?  Have you even read the thread?

Anyway, not like that's at all impossible -- it's a solved problem, and just a matter of it being worthwhile.
https://crack.sh/
This being an idle curiosity, it is not worth it.  And wouldn't work anyway.  Because it's not DES... :-DD

Tim
dietert1:
I have been involved with ciphers enough to understand that you know very little. You need to understand that a lot of so called cracks were disclosed by insiders for some reason. Don't believe the Mission Impossible junk. Reality is that it takes minutes to implement a private cipher that is mentioned nowhere and that you won't be able to crack. And mapping the result into something that looks like a simple obfuscation is easy enough.
As far as i understand from information on the web this is a stateful cipher and you may analyze hundreds of messages without getting anywhere.
This is not one of the riddles you may read about on the web.

Regards, Dieter
T3sl4co1l:
I certainly know very little, you are right!

But you also seem to be implying that it isn't worth investigating anything ever in a field like this, so why bother, more or less.  I'm curious why you would feel that way about something?

Tim
dietert1:
When i start solving a Sudoku, i assume somebody checked the solution before publishing it. Your riddle may be a little unfair in that sense. It may very well give you frustration instead of a kick. But maybe i am wrong and one of the forum members has a brilliant moment and solves this without spending hours, who knows. I would first check whether encryption depends on file attributes like name, size or  creation date.

Regards, Dieter
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