Breakthrough promises secure and private quantum computing at home
physics.ox.ac.uk
The full power of next-generation quantum computing could soon be harnessed by millions of individuals and companies thanks to a breakthrough by scientists at Oxford’s Department of Physics guaranteeing security and privacy. The advance promises to unlock the transformative potential of cloud-based quantum computing and is detailed in a new study published in Physical Review Letters.
In the new study, the researchers use an approach known as ‘blind quantum computing’, which connects two totally separate quantum computing entities – potentially an individual at home or in an office accessing a cloud server – in a completely secure way. Importantly, their new methods could be scaled up to large quantum computations.
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So regular cryptography is threatened by quantum computing, for sure. I imagine you'd wind up with some kind of quantum coprocessor like we used to have for math back in the day because quantum computing isn't a replacement for current computers.
That said, cloud-based quantum cryptography has a big hole in it: the connection to the cloud.
I don't see that happen anytime soon. The theoretical advantage can't be used because of practical disadvantages, so far.
Agreed, although I wonder how much further ahead state actors are compared to common knowledge. Standard encryption will be broken before most of us are aware, I think.
There are plenty of quantum resistant cryptography methods that already exist and have existed for a decade or more.