The best that can happen with TCPA is pretty good -
it could stop a lot of viruses and malware, for one

No, it can't. That's the point; it's not like the code running inside the sandbox becomes magically just becomes totally opaque to any external auditor. A black hat takes an exploit, encrypts it to the public key exported by the TCPA-compliant environment (think about a worm that encrypts itself to each cached public key) and sends the newly unauditable structure out. Sure, the worm can only manipulate data inside the sandbox, but when the whole *idea* is to put everything valuable inside these safe sandboxes, that's not exactly comforting.


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