Comment Re:A weapon is a tool tools use. (Score 1) 48
That one can probably be handled (temporarily) just by using a longer key. Which can give you time to do the switch.
The problem is that there's a lot of stuff already recorded that can't be protected that way.
That said, what quantum computers should really be good at is material design, quantum modelling, etc. But they need to be quite a bit stronger. (OTOH, DWave sells a specialized quantum computer that's reported to do a decent job in it's particular niche. It's just not a general computer. IIUC, it only handles relaxation problems.)