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 From: Luis
  Where is Luis?
 To: Bernard Bout
  Where is Bernard Bout?
 Bernard Bout
Subject: RE: Secure demo version
Thread ID: 50134 Message ID: 51500 # Views: 3 # Ratings: 0
Version: Visual FoxPro 8 Category: Security and Application Protection
Date: Monday, September 13, 2004 10:57:50 PM         

> Better than a system file stored somewhere on the HD, that FILE can find or in the registry that REGMON will find, You could after verification of the correct date, then recalculate the expiry date and HASH this and store it in the EXE itself. If you open any VFP exe, you will find lots of spaces where data can be "injected". Once you know that spot, you use VFP's low level commands to write into the EXE.
> Because files will need to be locked you can have an EXE that will be run for the first time installation. Your actual EXE will be installed as or any other extension.
> The First EXE will run, get the demo expiry date and hash it and "inject" it into
> Then it will rename to ApplicationName.EXE. It will also create a batch file or a reg entry that will be run on next restart of windows that will delete itself.
> There are as literally thousands of ways to protect and 1000's of ways to crack such programs. I know because I have ASM knowledge and crack such proggies for fun.
> Finally you will have to protect your EXE from being decompiled.
> > Hello,
> >
> >
> > i want to secure my demo version, so that after the time period for testing expires, it can not be launched again.
> > I am aware that this could be done with a security, unique generated number, saved in a system file.
> > Has anybody any idea how this works?
> >
> >
> >
> > Thank you very much.

Hey, these sounds great, can you explain a little more??, I'll like to learn this.
Luis Navas
For long you live and high you fly


Secure demo version Posted by Roxana Ragneala @ 8/29/2004 8:13:35 PM
;-) Posted by Mz @ 8/30/2004 9:46:40 AM
RE: ;-) Posted by Wild Fire @ 8/30/2004 7:37:04 PM
RE: Secure demo version Posted by Bernard Bout @ 8/31/2004 9:02:26 AM
RE: Secure demo version Posted by Mz @ 8/31/2004 9:34:55 AM
Bernard, you're one cruel guy. Posted by Dale Dedoroy @ 8/31/2004 9:11:22 PM
RE: Secure demo version Posted by Luis Navas @ 9/13/2004 10:57:50 PM
RE: Secure demo version Posted by Bernard Bout @ 9/14/2004 5:59:25 AM
RE: Secure demo version Posted by Luis Navas @ 9/16/2004 10:40:44 PM
RE: Secure demo version Posted by Bernard Bout @ 9/17/2004 5:39:29 AM
RE: Secure demo version Posted by Luis Navas @ 9/17/2004 11:46:29 PM