... and maybe not. It's not worth discussing the technical details - my expertise in microelectronics technologies goes only to the extent of the few lectures almost two decades ago...

And, as this is most probably the position of most of the other developers, too; the real question here is: who will assess the cost of such copying (i.e. the value of such copy protection scheme)? And what would such assessment cost? etc.etc.

And, it still won't address the associated risks I mentioned. The point is, that there is little benefit in putting a vast amount of money in securing a single spot, weak or not - security has to be addressed as a whole. People - even technically educated and even skilled developers - tend to believe blindly in the absolute power of science and technology, but there's nothing like a technically perfectly secure solution. And, what's even worse, you need to patch all possible security holes. The cost of these patches adds up, but their value does not - it's simply equal to the value of the weakest link.

I repeat myself, your offering might be interesting in certain context, but in itself, it won't solve magically all the security problems one can have with a mcu-based design.

Jan Waclawek