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Los Alamos National Labs Has Working Hub-and-Spoke Quantum Network
New submitter hutsell writes with this excerpt from MIT's Technology Review: "Richard Hughes and his associates at the Los Alamos National Laboratory in New Mexico announced today that they have been sending perfectly secure messages with their Quantum Internet that has been in operation for the last two and a half years."
Original paper. Unlike current quantum networks that only allow point-to-point networking, the system at Los Alamos combines traditional and quantum links to route messages through a hub while retaining the security advantages of quantum networking.
Oh, wait
Decentralization: a brief interval marking the decline of one centralized regime and the establishment of another.
Why do you think it took them two and a half years to report this? They had to make dead cat versions of every cat video on YouTube just so they could properly distribute them over the quantum network. That's a lot of dead cat videos. Your tax dollars at work.
it neutralizes "man in the middle" attacks on the key exchange, because if anyone listened in on the key exchange, you would know and can discard the key an renegotiate. At least that's how I'm reading. (my quantum mechanics-fu *IS* a bit weak)
Any word on what percentage of the quantum-encrypted traffic is flowing between classically-compromised systems?
For those of us who aren't quantum physics mega loser nerds, mind telling us at least -one- advantage in the summary? jeez.
Err. OK. Quantum computers are incredibly secure because they are so small, no-one can find their ethernet ports. That do?
I just red TFA, it seems there is a big scalability problem, as the network uses a central hub, and each node must have a direct optic fiber connection to the hub. The central hub security is critical, so we have a huge Single Point Of Failure.
All this stuff assume optical link cannot be taped. When I studied fibers at university, I recall being told about evanescent wave. Is it possible to infer some information from it without being detected? If not, how is it prevented?
As long as the conventional links only pass encrypted data without owning the key, it is perfectly secure. Quantum encryption usually means non-locally creating a one-time pad using quantum mechanics, and using that to securely encrypt classical messages (it can be proven that OTP is perfectly secure, so any attack against the scheme has to be with the OTP generation part, which is completely quantum). Indeed, even in protocols where you don't explicitly apply an OTP (as in quantum teleportation) you could consider the process to do the OTP implicitly. The point is that the classical data you send is in any case completely uncorrelated with the message you send. The security would not be compromised even if you put the classical data onto a public message board.
The Tao of math: The numbers you can count are not the real numbers.
...it's not transfer of info over QT. Such an invention would create a truely decentralised internet; peers connected directly without corporates and gvt as go-betweens.
Let me show you my thing; it's the most advanced on the planet.
...and I wasn't the first one in. This one has tracks on it.
Life imitates art!
I am very small, utmostly microscopic.
Obviously you have to employ lots of people in order to get all the cats eaten to avoid them going to waste.
Trolling is a art!
You should read up on it. It uses conventional symmetric encryption, as a cryptographic key-exchange is not more risky than symmetric encryption. Nobody does one-time pads via quantum modulation. It would take forever.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.