And much reverse engineering of silicon requires
access to the silicon. This means eating off the plastic housing with acid. Very
impressive things can be done, and I would wager that if you passed a sufficiently
interesting chip to a guy like Bunnie Huang he'd see about reverse engineering it.
There are indeed firms that can reverse engineer chips - even dead
ones. One is Taeus International in Colorado. These guys mostly do
work for clients looking for stolen technology.
http://www.forbes.com/forbes/2005/0328/068.html
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Will