Idk, people forget that our current state of the art in crypto/tech was once classified war technology.

From reading about codebreakers in WWII and stories about Kernigan & Ritchie being asked to keep research private by US intelligence... for decades after WW2 they essentially wanted people to be unaware of the cryptographic capabilities of governments / intel agencies.

Is it really that far a stretch to say that at least one super power has achieved some kind of useful scalable quantum computing? Years ago (like approaching a decade) I was reading about the Chinese using quantum physics and lasers to send messages from space to submarines under the sea, with capability to detect any interruptions / eavesdropping. Both the US and China announcing huge breakthroughs in fusion etc... seems like we're already there and this info is getting trickled out, the other "impossibilities" around it also being slowly leaked out