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New Spectre/Meltdown Variants

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Researchers have discovered new variants of Spectre and Meltdown. The software mitigations for Spectre and Meltdown seem to block these variants, although the eventual CPU fixes will have to be expanded to account for these new attacks.


via Bruce Schneier


gasesc interesant si articolul The Future of Computing Depends on Making It Reversible, It’s time to embrace reversible computing, which could offer dramatic improvements in energy efficiency
de Michael P. Frank , cit si un dialog postat de cititori: "I don't understand why they don't just make a separate processor for security sensitive concerns — one that's slower and auditable but still powerful enough to do nice things — and give that it's own physical bank of RAM, and allow it to simply communicate with the "crazy fast but side-channel-exfiltrateable" CPU(s).

You know they did all of that right? Intel ships a Pentium-class CPU, with no speculative execution, inside every CPU. AMD has something too, I've heard rumors it's ARM.


Too bad they did it exactly in the wrong way. They made an unauditable, unusable, trusted component (ME/PSP) that can compromise the main CPU. We can't remove their code, we can't put our own code there... but if we could, it would be exactly what you asked for. They're even advertising it as "for security"."

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