Description: A simple and effective method of cryptographic registration using the serial number of a hard disk for the development of software. Main purpose: to ensure that the software of the developer is not copied and used arbitrarily, every machine installed by the user needs to inform the developer of the user number and obtain the registration number. Basic principle: to do the hard disk serial number after operation for users, developers can use science-based calculator, according to the users to notify the user number and only oneself know the key directly calculate the registration code returned to the user; The client does not need to register the machine, the developer does not need the decoder, and the Windows system will be saved automatically after the registration is successful. No further registration will be required, and the software upgrade will not need to be re-registered.
The attached VC source code has implementation methods and detailed comments.
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