Everyday life on the internet is insecure. Hackers can break into bank accounts or steal digital identities. Driven by AI, attacks are becoming increasingly sophisticated. Quantum cryptography promises more effective protection. It makes communication secure against eavesdropping by relying on the laws of quantum physics. However, the path toward a quantum internet is still fraught with technical hurdles.
What’s the use for this
Did you even read the article? Its mentioned right at the beginning.
Yeah and we already have post quantum encryption so what reason do we need a quantum internet
Pretty sure this was made clear in the article but… I’ll outline the little I know on the subject as a complete layman.
Currently we have been able to use quantum effects to create single runs of fibre that cannot be intercepted. That is, if the data is intercepted by any known means the receiver will be able to detect this.
The shortcoming of this method, is that of course when you need to amplify the signal, that’s generally a “store and forward” operation and thus would also break this system’s detection. You could I guess perform the same operation wherever it is amplified, but it’s then another point in which monitoring could happen. If you want 1 trusted sender, 1 trusted receiver and nothing in between, this is a problem.
What this article is saying, is they have found a way to amplify the information without ever “reading” it. Therefore keeping the data integrity showing as “unseen” (for want of a better word). As such this will allow “secure” (I guess?) fibre runs of greater distances in the future.
Now the article does go into some detail about how this works and why. But, for the basic aspect of why this is a good and useful thing. This is pretty much what you need to know.
Nar I get that. My point is what’s the point of transferring quantum information. The only advantage I can see is doing a single quantum computation via decentralised nodes that are a significant distance from each other. But by the nature of quantum computations its not a useful thing to do.
Bro, read. It’s literally in his comment.
If the data is intercepted, the receiver knowns. It’s a huge advantage.
Prevents MITM attacks. Stops em dead in the tracks.
Detect the compromise before transmission of the data.
This is for communication, not computation or even cryptography. The point in transferring it this way is so as to maintain the unseen property of the photon.
Nothing personal, kid.
Lag-free communication.
No.
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We have proven that’s impossible. Speed limit c Einstein enforced.
Why impossible? Genuinely curious
To simplify - c is the maximum speed at which a “cause” can be transferred.
If I send a radio signal to turn on a light, and the light will only turn on in response to that signal, the signal cannot travel faster than c otherwise it would not have been able to turn on the light.
Physics. But their is scientific consensus that you can’t transfer information faster than light. Our maths for both quantum physics and Einsteinian physics have both proven its impossible. Ohh and it fundamentally breaks causation. Grandfather paradox type shit.