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by hannob 1442 days ago
I've been following this space for a while and this is a good question, but I think the answer is really a "ranges from 10 years to never".

There's a lot of investment currently in the quantum computer space (+ a lot of hype and scams). Yet this is still all very early research and far away from any practical use. The challenges to really build a QC that can break cryptography are enormous - and it is absolutely a possibility that they're too big to overcome.

1 comments

This article asserts that D-Wave and other quantum annealing devices will be able to mount attacks long before a machine exists that can run Shor's algorithm with error-corrected qubits in sufficient quantity.

https://www.forbes.com/sites/arthurherman/2021/06/07/q-day-i...

Quantum Annealing is not a threat for cryptography. You can safely dismiss these sort of articles.
To second what the sibling comment has said, "quantum annealing" claims by DWave are considered fairly overblown (on some rare occasions even misleading/scammy). If the claims of this article held, they would have been much better known in the field and published in much more popular venues.