Beat my encryption

Hello fellow programmers!

A guy from ICQ gave me the idea to code a encryption routine that will work for forums (where you cannot use all special chars) and so I did. I just wonder if anyone's able to beat it :)

Goal is to write a decryption routine. I will post the en/decryption program here in a few days if no one can beat it ;)
The encoded text is: "Hello world, how are you?" (without the quotes of course)

Quote:

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1C4C2Xj4CH-4'Cf0+E2N0s-S.4S 0b%3!q3t3&9,2%m3aO362G0E3'6" 7

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Hint: The password I used is 4 characters in size.

Are we supposed to guess the encryption method you followed?

Dunno. I think it will be pretty hard without knowing the method (hash, xor, your fancy custom way...). Actually if you made your own fancy custom way I really doubt anyone will come up with an answer...

hows about just giving me the program, cause I always wanted to see how one worked? If you dont want to post it, send it to me at [email protected]



Chris

send it to [email protected] also if u dont mind and title it like "Forum Encryption Dealy" or something..



-Me

Here you go. One program from me. Sharing ur knowledge is the best help you can give to others. Please refer my name when u use that program.:D

dont plan on using it, just looking. Thanks.


Chris

Quote:

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Originally posted by BillyYank42
dont plan on using it, just looking. Thanks.
Chris

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No problems.

Quote:

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Originally posted by Fox
Yep that's a easy way of encryption using Xor and converting invalid chars to normal ones... well done! Version 1 of my encryption was the same ^^" What I posted here is Version 2 which is a little advanced.

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Is that refering to me...???

I was just wondering that how hard is my encryption to crack...???

Quote:

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Originally posted by Fox
Oh well here's my program, sorry for not giving out the source, I don't yet plan releasing the encryption method..
(VB6 no specials controls needed)

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No offence dude but I am not running or doing anything with the EXE.

Shift + DELETE

Release the code if you want ppls to check the encryption. I know you will argue like this. What harm whould you do since you want to learn something or to ppls whom you are helping you.

Same happend to me and I released source code and everything was fine.

Cheers.

I am sure none of us at this forum are good enough to break such fancy encryptions. Neither we care :D.

You give this task to some Enc. Expert and he/she will break the crap out of this in few minutes ... :p

Go on, I dare anyone to run that EXE :D

Mwahahahahahaha...

Anyone who runs it, must either know 100% what the EXE does, or must be lower on the ladder of evolution than an amoeba with a weasel habbit ;)

Woka

Quote:

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Originally posted by spoiledkid
You give this task to some Enc. Expert and he/she will break the crap out of this in few minutes ... :p

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I am sure he/she will but all I want to know is how hard is it for a newbee. Some script kiddo hacker.

Cheers.

I tend to use a very simple encryption...
Store the data in a Byte array, so we have:

Code:

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bytData(0) = 167
bytData(1) = 76
bytData(2) = 76
bytData(3) = 111

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I then double each byte, so 167 would become 334, then subtract 255, which leaves 79.
Using another byte array I populate this with the 2 values I have just calculated...so:

Code:

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bytData(0) = 167

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Would transform into:

Code:

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bytEncrypt(0) = 255
bytEncrypt(1) = 79

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Now since I know the length of bytData, using the UBound command...I can preset my encrypted byte array to be double that, this means I can do (using the data I have used in this post):

Code:

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bytEncrypt(0) = 255
bytEncrypt(4) = 79

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Very simple, but very effective :D

Woka

A few points...most people here are professional VB Developers, myself included. Can't be arsed, and don't have the time, to piss around attempting to break some encryption...we have deadline to hit. I could write some encryption code that would take you weeks, if not months, to crack, but again, I can't be arsed.

2ndly, If that EXE is compiled using VB6 then it's impossible to extract the code using a decompiler...someone of your expertise should know that ;)

3rdly, Like I posted above, I very much doubt anyone will run that EXE...no-one gains anything from attempting to crack your encryption...actually I'll give them a sad rating of 11.5 :D

If you have no problem is releasing the source code then just ****ing do it...:rolleyes:

You could always log out of VBF, and log into a chat room to discuss whether the Millenium Falcon can function with a Clingon cloaking device attached to it engine...but I'm sure you're above that ;)

I am in a ranting mood today :D

Woka

Thanks woka. U saved my lot of typing for me.

Because I wanna see people laugh at you :D

Woka

Quote:

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Originally posted by Fox
I have no problems releasing the source but as said I want to know if people can break my encryption. There's always a change for encryption experts to be here, if you're not one just ignore the post and go playing Quake.

And if you really care take your disassembler and get the source out of the program. *rolleyes*

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I can give you all the control names in 5 minutes if I want to.

cmdNoise
txtEncode
lstEncode
cmdMirror
txtKey
Password
cmdDecode
txtInput
cmdCopy
cmdPaste
cmdNew
lblCopyright
lblSize
lblStatus
mUtils

infact this is the VB6 installation path,

C:\Programme\Microsoft Visual Studio

Enjoy.

Quote:

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lblCopyright

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Serious?

Hahahahahahahahahaha...*breathe* Hahahahahahahahaha

:D

Quote:

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Originally posted by Wokawidget
Serious?

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You bet it.:eek:

Anyone experienced with disassembling would crack your encryption within minutes..... like me :)

Although, VB assembly is different from regular compiled programs.... like a C program, etc..... So it actually makes it more difficult.

u wouldnt mind if i used the source u posted in an app of mine, would u? id give u credit and all