All of the sibling comments have great explanations of common processes, but one is missing: a metal mesh as part of the top of the CPU silicon. It's talked abo

All of the sibling comments have great explanations of common processes, but one is missing: a metal mesh as part of the top of the CPU silicon. It's talked about a little bit here: http://users.encs.concordia.ca/~clark/courses/1501-6150/scribe/L09b.pdf http://users.encs.concordia.ca/~clark/courses/1501-6150/scri... Essentially, there's a "trap" on the top of the chip that resets the memory if touched by a conductive probe of any kind. I don't know the specifics of how you'd construct such a thing, but it seems like it wouldn't be too complicated to do.