Re: Generate license numbers for shareware - How ???

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Hi Paul,

I do not want to enforce an online activation scheme. The software is a
(small) contact management system intended for professionals and small
companies. Such a software is usually used for many years.

I cannot guarantee that an activation would still be possible in a
couple of years. The activation of Microsoft products is annoying but
you can be reasonable certain that such an activation will be possible
in the future. If I go out of business, activation for my products
would no longer be available and the customers would no longer be able
to reinstall my products.

Thanks to the others for recommending suitable products. I will look
into them and report my findings.

With best regards,
Paul Hoepping.




Paul E Collins schrieb:

Paul wrote:

I want to make it as hard as possible to write
an illegal key generator for my license number
system. I cannot disable the illegally generated
license numbers without also disabling the license
numbers issued to paying customers.

You can if you require users to connect to the Internet to validate
the licence number against your database of live ones*: that might
also give you hints as to whether many different people are using the
same key. It's a bit annoying for users, though (not everybody has an
"always-on" Internet connection, or even Internet access at all) and
might be perceived as invasive.

Eq.

* Yep, somebody could crack it to remove that entire check, but I
don't know what you can do against crackers beyond using some kind of
obfuscator.

.

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