The original Nature article is here: http://www.nature.com/news/chinese-satellite-is-one-giant-st... This is a reprint.
Thanks, we updated the link from http://www.scientificamerican.com/article/chinese-satellite-..., which pointed to this.
Chinese satellite is one giant step for the quantum internet
11–20 of 29 posts
Re: Chinese satellite is one giant step for the quantum internet
#12So what if someone decided to DOS quantum communications by spying on all of them? You don't need to be successful at deciphering the communications; you just need to tamper with many of them to make a whole bunch untrusted, and eventually others stop trusting the whole channel because most messages have false interception positives.
Re: Chinese satellite is one giant step for the quantum internet
#13Wonderful achievement, kudos to Chinese scientists and engineers who pioneering this breakthrough.
Re: Chinese satellite is one giant step for the quantum internet
#14So what if someone decided to DOS quantum communications by spying on all of them? You don't need to be successful at deciphering the communications; you just need to tamper with many of them to make a whole bunch untrusted, and eventually others stop trusting the whole channel because most messages have false interception positives.
Exactly what I was thinking, if it's easy to tell they've been intercepted by a third party that infers it's possible to do it so what's to stop a DOS attack making it useless?
Re: Chinese satellite is one giant step for the quantum internet
#15Does speed of communicate with entangled photons travel faster than speed of light?
For example if we have the device that encode/decode voice with entangled photons and put that on Moon, Mars, does that form of communication has any delay like normal electronic communication would?
Re: Chinese satellite is one giant step for the quantum internet
#16What about the interference from the trisolarians?
Re: Chinese satellite is one giant step for the quantum internet
#17So what if someone decided to DOS quantum communications by spying on all of them? You don't need to be successful at deciphering the communications; you just need to tamper with many of them to make a whole bunch untrusted, and eventually others stop trusting the whole channel because most messages have false interception positives.
Exactly what I was thinking, if it's easy to tell they've been intercepted by a third party that infers it's possible to do it so what's to stop a DOS attack making it useless?
Right. The only difference between that and what we have now is the ability to detect tampering.
Re: Chinese satellite is one giant step for the quantum internet
#18Does speed of communicate with entangled photons travel faster than speed of light? For example if we have the device that encode/decode voice with entangled photons and put that on Moon, Mars, does that form of communication has any delay like normal electronic communication would?
No, it doesn't see the No Communication theorem. https://en.wikipedia.org/wiki/No-communication_theorem
Re: Chinese satellite is one giant step for the quantum internet
#19So what if someone decided to DOS quantum communications by spying on all of them? You don't need to be successful at deciphering the communications; you just need to tamper with many of them to make a whole bunch untrusted, and eventually others stop trusting the whole channel because most messages have false interception positives.
Exactly what I was thinking, if it's easy to tell they've been intercepted by a third party that infers it's possible to do it so what's to stop a DOS attack making it useless?
> if it's easy to tell they've been intercepted by a third party that infers it's possible to do it so
This is a logical fallacy. Furthermore, it says nothing about how difficult a DOS attack would be to perform.
Re: Chinese satellite is one giant step for the quantum internet
#20> Eventually, quantum teleportation in space could even allow researchers to combine photons from satellites to make a distributed telescope with an effective aperture the size of Earth — and enormous resolution. “You could not just see planets,” says Kwiat, “but in principle read licence plates on Jupiter’s moons.” Uh, what? What does entangled photons have to do with interferometry-based astronomy? Can somebody exp…
It lets you bypass some classical limits. It's a well known idea. For example, John Preskill mentioned entangled telescopes in a non-technical talk back in February [1].
A specific case is "NOON" states [2]:
> NOON states are an important concept in quantum metrology and quantum sensing for their ability to make precision phase measurements when used in an optical interferometer.
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Here's an example that doesn't exactly use entanglement, but does use quantum stuff to give you the general flavor. Suppose you have an optical setup like this:
B
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v
A --> ◩ -----> D1
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v
D2