> It will cost power and die space, and make the system LESS reliable,
> AND require a "blessing booth" for every manufacturer.  And what
> happens when XYZ co gets sold and stops supporting chip W which I paid
> for, and need to use?
>
> Sounds like a great way to get your chip designed out of a project.

I cannot see how they can claim it is foolproof. It seems to me that the old 
'shave the layers and see what the pattern is' method of chip duplication 
could fool the system. 

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