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How to prevent installation of a firmware on non original boards

Question asked by JulienD on Jul 28, 2015
Latest reply on Jul 29, 2015 by Danish Ali

I'm building an application on a custom board. I plan to give free firmware upgrades to
customers but I wonder how to prevent the installation of this firmware on non original
boards (copy) ?

I would be pleased to have a software answer but I not convinced that it is possible.
Hardware answers are also welcome.