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securitycryptographylicense-keyproduct-key

Checking the number of machines

I wish to seek suggestions on th following:

While creating a product key if one wish to use the no. of machines the key is made for , just like in the case of Microsoft Volume Licensing , how can one do that so that easily verfiable inside the dll which is made to verfiy the key entered in the installer and say if a key is made for say 100 machines how does one validate it offline that the product key does not work on 101th computer.

Thanks,

Solution

  • It's called 'floating licenses'. You can have a 'license server' that reserves N seats for specific local area network. When an instance of application is launched it connects to the 'license server' and queries a permission to run. If there are already N connections, N+1 instance start up will be denied.

    Check the http://activation-cloud.com it might be useful for you.