serial key on a program

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hello i have created a program and i wanna sell it online but i want it not to be able to be copied. I think that not being able to be copied can't be done.So all i need to do is to make it need a serial key to open.Can anyone tell me how to do that, how to make it open only when a serial key is given to it.Appreciate your help.!

Posted 8-Feb-12 8:12am

Juljano

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Espen Harlinn · Answer 1 · 2012-02-08T08:59:00

Solution 1

Have a look at: Application Trial Maker[^]

Be aware that any moderately accomplished developer can easily break the protection offered by most .Net based protection mechanisms - so basically you should try to find a better way to motivate customer loyalty like subscription based extra online features.

Best regards
Espen Harlinn

Posted 8-Feb-12 8:59am

Espen Harlinn

Comments

thatraja 9-Feb-12 0:39am

Frequently I'm using that article in Q/A, 5!

Espen Harlinn 9-Feb-12 3:35am

Thanks, I picked it up from one of your answers :)

Sergey Alexandrovich Kryukov 9-Feb-12 12:34pm

Sure, a 5.
--SA

Espen Harlinn 9-Feb-12 15:28pm

Thank you, Sergey!

Christian Graus · Answer 2 · 2012-02-08T08:59:00

You write code that checks the serial number. And if you don't want people to copy the serial number and share it, you make the serial relate only to the selected machine, which you do with WMI. And if you want it to work, you need to obsfucate your code with an expensive tool, or rewrite it in C++. At the end of the day, you need to strike a balance between making it safe, and being a PITA to your genuine users.

If there was one bit of code that did this for everyone, then every piece of code would be cracked the same way. It's up to you to write something that suits your needs.