Yes, I agree with you. Boring the cracker with multiple check points is the best way to push him away.
> A CRC is an excellent way to ensure that no one > alters your EXE and that your protection scheme is in place. As I saw they use so called loaders to patch your code not on the harddrive but in memory, so goodbye CRC. They also can recalculate the CRC and replace it. --- "Marshall E. Fryman" <[EMAIL PROTECTED]> wrote: > One of the reasons all of these applications have cracks is that the > method of implementation is factored. As programmers, we like to factor > our code so it's nice and neat - one or two calls provides whatever > functionality we would like. The down side to this is that the crack has > to modify one or two areas of the application in order to defeat the > protection. > > If you want decent protection, you pretty much have to write your own > scheme and then de-factor it (I use includes in Delphi but macros work > for C). Since most of my applications are business related, I store some > of my registration information physically in the database that I am > creating (which no business would willing share) and some in the EXE > itself. > > Finally, you must have multiple calls to the defactored code spread > throughout the application. For instance, if you put the defactored code > in every forms OnCreate event, that is potentially hundreds of places in > the code that would have to be discovered and cracked around. That > leaves the only real method of cracks to be discovery of the key data. > By spreading the data throughout the EXE and the data (and possibly the > registry, although I personally never use the registry for anything) and > having a variety of different tests, it becomes very difficult to make > sure that the application is truly cracked. > > If you pay attention to what the crackers are really doing, they are > jumping AROUND the protection or returning success. Mostly they do this > by altering the EXE. A CRC is an excellent way to ensure that no one > alters your EXE and that your protection scheme is in place. > > BTW, as far as dates go, I always use an alternative date scheme based > on julian or some other arbitrary scheme that is not commonly used or > known. It basically makes the dates look like any other int32. > > HTH, > m > > > __________________________________________________ > Delphi-Talk mailing list -> Delphi-Talk@elists.org > http://www.elists.org/mailman/listinfo/delphi-talk > If I choose Christianity then the Islamic will say I'm a pagan. If I choose Islamic then the Buddhism will say I'm a pagan. If I chose Buddhism then the Jewish will say I'm pagan. If I choose no God then everybody will say I'm pagan. Please, can I be free? Can you NOT tell me how I should live MY life? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __________________________________________________ Delphi-Talk mailing list -> Delphi-Talk@elists.org http://www.elists.org/mailman/listinfo/delphi-talk
