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 From: Bernard Bout
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 Bernard Bout
 To: Mz
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 Mz
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Subject: RE: The Encryption Technique there is REVERSIBLE!
Thread ID: 32763 Message ID: 34319 # Views: 1 # Ratings: 0
Version: Visual FoxPro 8 Category: Security and Application Protection
Date: Friday, December 12, 2003 5:26:21 AM         
   


Well the source is still decompilable.

>
> ok... perhaps i wont reveal some trade secrets of my own. ;-)
>
> anyway, you can make use of my OBFUSCATOR (this i can share).
> its open source indeed (however, there are some bugs you might find).
>
> in my case, i allow people to decompile my application. but they will do
> it the hard way.
>
> (this are some of Mz's trade secrets)
> imagine this:
>
> you as a company develop programs. lets say you made a code to add 2 numbers
> a + b and print the sum. therfore, we code in foxpro like this:
>
> a = 5
> b = 9
> c = a + b
> ? 'sum = ' + str(c)
>
> then i have a tool for public use 'OBFUSCATOR' so that you can keep the original
> code and make a copy of it to obfuscate. therefore, you can use a technique
> like this:
>
> a = (((20792.75 * 8) - 1) + 4) / 33269
> b = ((((18 + 9) * 2) + 2) / 2) - 19
> c = ((((a + b) * a) / 2) * 2) / a
> ? 'sum = ' + str((c - a + b) - (b - a))
>
> then we compile the code above.
>
> logically, when you run the program, the program is still the same right.
> because when we compute:
>
> a = (((20792.75 * 8) - 1) + 4) / 33269
>
> we arrive at
>
> a = 5
>
> this technique garbles the code, right? and if you have an existing application (.exe)
> when they apply refox here, they will be able to get, not your original source code,
> your obfuscated code. since it is the one you compiled.
>
> therefore, if bugs are reported or there are changes for modifications and
> customization, the company will debug the proper, readable, original source code.
>
> and that's it. what we intend to do is to prevent other developers not just from learning
> how our program works, but occasionally the time spent on developing it.
>
> in my case, this is enough coz I can apply different algorithm and technique for
> obfuscating the source.
>
> now how about this my friend? ;_)
>
> -MzDarkReligion
>
>
>
>
>


ENTIRE THREAD

refox - beating the encryption Posted by stevenm hmm @ 11/14/2003 9:05:01 PM
RE: refox - beating the encryption Posted by Eric den Doop @ 11/14/2003 9:25:44 PM
RE: refox - beating the encryption Posted by Karben Selim Mejia @ 11/14/2003 10:35:55 PM
RE: refox - beating the encryption Posted by Eric den Doop @ 11/15/2003 2:08:08 AM
RE: refox - beating the encryption Posted by Boudewijn Lutgerink @ 11/17/2003 12:48:59 PM
RE: refox - beating the encryption Posted by Bernard Bout @ 11/18/2003 6:13:50 AM
RE: refox - beating the encryption Posted by Boudewijn Lutgerink @ 11/18/2003 9:05:41 AM
RE: refox - beating the encryption Posted by Karben Selim Mejia @ 11/18/2003 2:55:33 PM
RE: refox - beating the encryption Posted by maximilian ali @ 11/19/2003 10:02:57 PM
RE: refox - beating the encryption Posted by Jamie Osborn @ 11/20/2003 1:08:49 AM
RE: refox - beating the encryption Posted by Boudewijn Lutgerink @ 11/20/2003 7:32:00 AM
RE: refox - beating the encryption Posted by Mz @ 11/21/2003 2:44:44 AM
RE: refox - DEFEAT REFOX Posted by maximilian ali @ 12/7/2003 8:20:43 PM
RE: refox - DEFEAT REFOX Posted by maximilian ali @ 12/7/2003 8:30:28 PM
RE: refox - beating the encryption with OBFUSCATOR Posted by Rene Relucio @ 12/8/2003 4:01:04 AM
RE: refox - beating the encryption Posted by qi seven @ 12/9/2003 1:43:30 AM
RE: refox - beating the encryption Posted by dm dm @ 12/10/2003 2:22:31 PM
RE: refox - beating the encryption Posted by Eric den Doop @ 12/10/2003 4:06:08 PM
The Encryption Technique there is REVERSIBLE! Posted by Mz @ 12/11/2003 2:37:07 AM
RE: The Encryption Technique there is REVERSIBLE! Posted by T├Ánis Pihlakas @ 12/11/2003 1:31:40 PM
RE: The Encryption Technique there is REVERSIBLE! Posted by Mz @ 12/12/2003 3:30:27 AM
RE: The Encryption Technique there is REVERSIBLE! Posted by Bernard Bout @ 12/12/2003 5:26:21 AM
RE: The Encryption Technique there is REVERSIBLE! Posted by Mz @ 12/12/2003 8:59:18 AM
RE: The Encryption Technique there is REVERSIBLE! Posted by khubaib khalid @ 12/12/2003 5:24:05 PM
OK... ;-) Posted by Mz @ 12/15/2003 4:21:12 AM
RE: refox - beating the encryption Posted by dm dm @ 12/14/2003 12:50:20 PM
RE: refox - beating the encryption Posted by Boudewijn Lutgerink @ 12/16/2003 11:15:48 AM
RE: refox - beating the encryption Posted by dm dm @ 12/16/2003 12:24:22 PM