When software comes with a license code, e.g. HXD5S-LB99C-HII54 how does the program know the code is valid without internet validation? For example, some older Microsoft software like Office 2003 could be installed without internet access and you would type in the code and the computer would validate the code. I’ve always been curious about this and the mechanism of how validation occurs.
In: 5
The mathematical equation that was used to generate the code, is the reverse of what the application is looking for.
So when it breaks down the code using the reverse of the original equation it gets the hash it wants, if the code is valid.
These vids might help:
Unless your question is weather or not your can reuse your license.
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