I have seen them plenty of times, with many different types of software, but the one thing I have always wondered, is how software keygens know what key to generate. I know the basic principle of it: the keygen looks somewhere in the software installation files and creates a key that matches some encrypted file which allows the program to work. But I wanted to know how they do that, and how to prevent it. This is really a multiple part question. • How does the key-system work? • How do programmers usually create software that works based on a key.
I am an intermediate programmer, but I never learned much of the security/anti-piracy aspect of it. How do they create and/or recognize the keys to allow the software to start working? • Where does it usually look to find this 'encrypted file'? • Is it in a physical file on the computer, or an of-site database that it calls?
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