That regedit competent user only has to know about a crack site where the modified exe is posted.
I agree that the level of protection can get absurd and the dedicated hacker will get your exe cracked no matter what. However, the previous poster had expended a lot of effort on a method that would be easily hacked with a standard tool in the hackers arsenal. It's better not to make it so easy for them. The best protection in my mind is to use packages and supply a certain package as demo version only. When they buy the product, they get the real package. Most hackers are too cheap to buy the product just to hack it. With the finished product, use a registration scheme like those mentioned so they can't give it away to friends so easily either. Dave --- Walter Prins <[EMAIL PROTECTED]> wrote: > > ----- Original Message ----- > From: "David Smith" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Monday, May 30, 2005 8:59 PM > Subject: RE: [list] RE: [delphi-en] Re: GUIDs and > the registry > > > > > > The problem with your method is that all a > cracker > > has to do is recompile your app and replace one > bit in > > your code: the return value to your question: is > my > > ini file uncompromised? Then when your routine > comes > > back claiming the file has been comprimised, that > is > > the right answer and your app loads! > > This is true - however I think the assumed level of > user he was suggesting > protection against is the sort that might know about > regedit but wouldn't > know how to (properly) drive a debugger to find the > correct JE or JNE > instruction to modify the check condition. :-) If > you want to try and > deter slightly more knowledgeable useres then there > is of course also the > possibility for the application to include a > checksum for the exe file > itself in the encryped ini file - in that case > modifying the exe will also > cause that check to fail (of course, that check > might also be hax0red)... > Also you get exe file packers/encrypters that will > make the job of finding > and modifying the checking code that much more > difficult. > > Regards > > Walter > > __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new Resources site http://smallbusiness.yahoo.com/resources/ ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
