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>> The paper notes that Spectre can, and will in the future be able to defeat all programming language level techniques of isolation.

That's why I said we need trusted cores - i.e. ones that don't implement speculative execution or share cache with other cores. Untrusted code needs to be run in physical isolation, not just virtual isolation.

But the real solution to all of this is not to run untrusted code at all. This raises the question of how we come to trust the code we run. The simplest and most obvious thing we need to do is disable javascript. I mean how can you possibly trust code that came in a 3rd party payload used for advertising? How can you trust anything from Facebook? Or any of them? The answer is that you can't and in may cases should not.




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