[extropy-chat] FWD (SK) RFC: copy protection report

Acy Stapp acy.stapp at gmail.com
Thu Dec 1 16:43:00 UTC 2005


Online unlocking can be defeated by capturing the decrypted code using
SoftICE or a hardware in-circuit emulator. There are numeroues methods
for detecting SoftICE and other debuggers, but in the end your only
solutions are to use an off-the-shelf copy protection package and
accept that you will be cracked or develop your own copy protection,
and expect to be cracked unless you hire an expert to develop it
specifically for your product.

Acy

On 12/1/05, Eugen Leitl <eugen at leitl.org> wrote:
> On Thu, Dec 01, 2005 at 09:34:23AM -0600, Acy Stapp wrote:
>
> > At some point in your code you are going to have a function to check
> > the copy protection and a cracker will find this function and change
> > the machine code to return true.
>
> Online unlocking (decrypting part of the application with a key
> obtained from a server or a piece of application itself) would do.
>
> > Really your only hope is to be so obscure that noone wants your
> > product and no crackers want to break it.
>
> Another model is charge for support. Then you can even opensource
> your package.
>
> --
> Eugen* Leitl <a href="http://leitl.org">leitl</a>
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