this post was submitted on 04 Dec 2023
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IBM releases first-ever 1,000-qubit quantum chip (www.nature.com)
submitted 11 months ago by [email protected] to c/[email protected]
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[–] [email protected] 0 points 11 months ago (3 children)

So, web encryption broken when? Now?

[–] [email protected] 0 points 11 months ago* (last edited 11 months ago) (2 children)

It takes about a billion qbits to break 2048bit encryption, so a while. I saw something about reducing it to about 20 million qbits recently, but it's still a while off.

[–] [email protected] 0 points 11 months ago (1 children)

More importantly, how long until I can guarantee a 51% chance of solving every bitcoin block?

[–] [email protected] -1 points 11 months ago

Hash functions are not known to be quantum vulnerable (i.e., there's no known quantum algorithm that provides an exponential speedup, best you can do is to use Grover's algorithm to slightly speed up the brute force search). So maybe never.