Accelerated Forging

What better way to prevent counterfeiting than to require that some portion of your product can only be made by a factory whose size and shape can be verified by a satellite. But, how to handle the problem of the thing being located underground? Interesting problem. You should need sunlight to make the product - so you can check for sunlight collection somehow. I can see the Russians or Chinese setting up a state-owned enterprise to actually try something like this to get the Americans. Now, what can of tag can you produce like this? Accelerated comes from linear (or other) accelerator - a machine so big and of such regular shape that it can only be expected to do one task.