New answers tagged software
The simplest way to implement registration keys is to trust your users. (Or, "don't use keys.") As long as your sales contract is clear enough and written properly, you can use the courts to collect against the odd successful scofflaw. Going upwards from that in complexity and security, you have: Sell your calculator exclusively via an online store, ...
No, that's not true. CORBA systems adhere to an interface regardless of the programming language of their actual implementation. For example, one can implement the server using C++ and the client in Java.
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