5 ms·

> Is there a fundamental reason we cannot make speculative execution secure You've said it yourself > The fact that this also prefetches memory for us is amaz

> Is there a fundamental reason we cannot make speculative execution secure You've said it yourself > The fact that this also prefetches memory for us is amazing To be secure, speculatively executed instructions that don't retire, have to have no observable effects, including those observable through timing. They cannot be allowed to modify the cache hierarchy in any way.

bob1029 3y ago
Does speculative execution on my CPU affect your computing environment?
- mike_hock 3y ago
  If you're completely airgapped from me, no, but that's not interesting, is it. As soon as you allow any form of interaction, you're potentially leaking information through the timing side-channel.