Al, check out http://skyscraper.fortunecity.com/true/461/protec.htm for an
article on methods of copy protection (and a bunch of stuff/link's to do the
reverse) - basic idea with any security is to apply it in layers; Suffice to
say, nothing is impossble, but you can make the process more
difficult...Last time I checked wrapping your app with vbox or similar was a
no-brainer way to implement protection, which was pretty solid (we'll
atleast until that version of vbox got cracked...)
rgds
> -----Original Message-----
> From: Alistair George [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, August 13, 1999 7:36 AM
> To: Multiple recipients of list offtopic
> Subject: [DUG-OFFTOPIC]: Cracks
>
> Hi All. Not sure if this should be offtopic, but......
> Have found that there is a crack on the net for my software (fortunately
> its
> out of date).
> This is a surprise to me, because the reg code I use is very powerful and
> uses 32-bit encryption on several different checks, including the
> hdserialnumber.
> Which makes me think, and maybe you can confirm that:
> Do these buggers do a dissasembly, and check for program patterns which
> typify startup reg code. EG conditional jumps in the startup code which
> may
> indicate registration checks.
> It would appear so, because what their crack code does is rebuild the EXE.
>
> If so, that is interesting to me, because it leads to another aspect of
> software protection which is outside the regimes of software protection
> components, in that the protection is lost due to the vulnerability of the
> EXE itself. Or, to be clearer, if a regcheck is done at the start of a
> program by you, and it is correct, you set one boolean variable right? If
> that can be cracked, the whole program is then compromised.
> Thanks,
> Al+
>
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