Saw a comment on a banking thread that said that Quantum Computing will kill crypto, I assume because it would be able to edit the blockchain and thus killing the entire point of bitcoin, but how exactly would it do this? How does it work and why does it mean all current encryption would become useless?
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Do you happen to know when quantum computers will become a thing that can be used outside major corporations? The videos I watched looked to be something that was still a long way away.
There needs to be consumer utility for them to be attempted. I haven't heard of a practical use for normal people for quantum computers.
Neural renderers could be one, but such a software doesn't even exist as a prototype.
Or a war with a major power. Decryption tech would instantly become a priority.
For consumers?
No, but that's not relevant.
Most of the technology we have today ultimately came about in the middle of WW2. Everything from computers to radar to jet and rocket engines, to nuclear weapons and nuclear reactors.
A war with a major power would see tens of billions dumped into breaking encryption as quickly as possible, and once that tech exists, it will spread, and it will be used everywhere.
The computer needs 4000 qubits.
currently the largest has 256 qubits
https://phys.org/news/2021-07-team-quantum-simulator-qubits-largest.html
What's stopping them from plugging in 16 of them together to make 4000 qbits.
Physics.
No one knows that. For all we know the technology exists within governments, and they're just not letting on.