Re: Protecting Software w/ Software License Keys...
Re: Protecting Software w/ Software License Keys...
- Subject: Re: Protecting Software w/ Software License Keys...
- From: Thomas Deniau <email@hidden>
- Date: Sun, 16 Jun 2002 07:49:00 +0200
Le 16/06/02 1:24, Erik J. Barzeski disait :
>
But also like I said: if people want to crack your app, they will. Period.
>
I've never seen a fail-safe registration code system. They can't be done,
>
simply because if you can create a code, you can reverse engineer a code.
You can keep a list of somehow hashed or encrypted (MD5 for example)
registration codes in your sourcecode (a table of encrypted codes).
This way the reg codes won't be visible in clear in the datafork so people
won't figure them out easily, and there is no algorithm to create a
registration code which people can crack.
And if one purchased code leaks, you simply remove it from the list in the
next version. Or, if your app uses the Net, check it against a list on the
Net (and quit immediately if you can't connect to the mother server, because
people can use a firewall to block your request).
--
Thomas Deniau
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