Re: Tamper Resistant
I presume that's a part of what they hope to defeat. Other microcontroller manufacturers include physical safeguards so one can't take a hammer or a gently wielded scalpel to a chip without destroying its contents making that attack vector non-viable.
That doesn't mean it cannot be done, as acknowledged in the article, but it does raise the difficulty and cost of doing that. It's a variation on security through obscurity; not worth the cost or effort.