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A comment on Toshiba reports milestone in quantum cryptography. Parent comment

Re:Toshiba reports milestone in quantum cryptography by jl6 on Thursday August 26, 2021 @07:06AM (#28313232)
> With QKD you only have to trust that the person you want to talk to is on the other side of the quantum link you've established

I can see how that would be an easy thing to trust if the only people capable of building such a link are your fellow scientists, but in a scenario where this technology becomes common, is it reasonable that users would ever be able to verify who is listening at the other end?

If not, what’s the use case?

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Re:Toshiba reports milestone in quantum cryptography by joconde on Thursday August 26, 2021 @07:20AM (#28313356)
It would be useful for any organization that has the means to implement this. I can see AWS datacenters and rich governments rolling our their own QKD.
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Re:Toshiba reports milestone in quantum cryptography by cryptonector on Thursday August 26, 2021 @10:41PM (#28323756)
You can't authenticate it. It's not secure. Full stop.
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Re:Toshiba reports milestone in quantum cryptography by joconde on Saturday August 28, 2021 @07:09AM (#28337173)
Why would it be impossible for a government or large cloud company to control all the nodes in a QKD system? In that case, they could rely on the physics to detect eavesdropping. The problem for simple customers is that they can't be sure that the transmission isn't MITM'd somewhere, but that's only because they don't build and maintain the whole channel themselves.
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