If replicated, such attacks could pose a threat to software that uses RSA or AES encryption.
www.pcmag.com
Yep, it's already possible with existing quantum computers, but those are rare enough, and sufficiently limited in capacity that they can only be used in targeted attacks.
It becomes a real problem when they get faster, and there are more of them.
But yeah, we are really already in a period where if you are interesting enough (which honestly, most of us aren't) no existing encryption you can get your hands on should be considered "safe".
I'm sure this is totally classified, but I can't help but wonder how the armed forces are beefing up their encryption in response to this. I'd imagine that in order to stay up to speed with the cryptography arms race will require quantum computers to compute new quantum ciphers. Does that mean a quantum computer on every ship, in every tank, on every plane, in every drone, etc. etc.?
If the user of a quantum computer can issue competing instructions to a drone (or loyal wingman) or confusing intelligence or fake orders to aircraft, ships and submarines, you'd think they have a real potential problem.
And these things can't all be upgraded and replaced overnight.
Though the fact that the Quantum Computing threat to encryption has been coming has been well known for so long now, that I can't imagine that effort didn't start a long time ago.