Post Syndicated from daroc original https://lwn.net/Articles/1088305/

Practical quantum computers have been ten years away for the last several
decades. Now, however, it’s beginning to look as though they will be
possible in just a few years. Recent

research with obfuscated results demonstrated much lower memory requirements to factor

ECDSA keys on a quantum computer, with

work by other researchers in the open more than halving memory use compared
to the state of the art in 2023.
At the same time, computer
manufacturers are

boasting quantum processors that retain viable superpositions over longer periods.
Given how slowly software updates filter out to stable systems, it’s worth
looking at what configuration changes and protocol updates are needed to be safe
from quantum computers now.