--- Max Bian wrote:
> I found it will be very difficult to deal with
> cracker who modify the application to make it
> full-functional. So I decided the only hole
> I can plug is to make the key-gen very
> difficult if not possible. To do that,
> asymetrical-key encryption (eg. RSA) is a way
> to go.
But at some point, your app is going to have to do
if (validKeyEntered)
// do program
else
// refuse to do program
and all the crackers have to do is insert a NOP in
place of the if.
You can read all about why it's a waste of time to try
to make your app uncrackable in a paper Aaron Ardiri
wrote. Search the archives -- a link to it is in
there somewhere.
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