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Speculative execution is a technique used by processors to improve performance.

If the guess is correct, it speeds up processing; if not, the incorrect results are discarded.

An abstract image of a lock against a digital background, denoting cybersecurity.

(Image Credit: TheDigitalArtist / Pixabay)

Those interested in technical details can read the in-depth analysishere.

These are the same researchers that discovered the iLeakage vulnerability a year and a half ago,BleepingComputerreminds.

That one, too, was a side-channel flaw.