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Scientists Race To Establish the First Links of a 'Quantum Internet'
ananyo writes "Two teams of researchers — once rivals, now collaborators — are racing to use the powers of subatomic physics to create a super-secure global communication network. The teams — one led by Jian-Wei Pan at the University of Science and Technology of China, the other by his former PhD supervisor Anton Zeilinger of the University of Vienna — have spent the last 7 years beating each other's distance records for long-distance quantum-teleportation. They now plan to create the first intercontinental quantum-secured network, connecting Asia to Europe by satellite."
The word "US" is nowhere in sight.. Asia and Europe.. Why am I not surprised?
I can't wait till it becomes mainstream!
Couldn't quantum teleportation (paralell with some form of classical communication like the internet) be used as an uneavesdroppable communication channel?
Do not, under any circumstance, let any major ISP help with this.
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but will it lower my ping in starcraft?
Does evesdropping on a quantum message destroy the message? People talk about super secure quantum messages because it leaves a detectable trace, but does it also destroy the message in the process?
Some people die at 25 and aren't buried until 75. -Benjamin Franklin
Now the rest of the world can proceed to steal their technology and not pay them for it.
Yay! QE is a major component of my scifi book's communications. Yes, it's a crappy book, but it is my crappy book... and you can read it online without DRM, blah blah blah.
http://cruft-private-janitorial.com/?chapter=1
Can't wait for animated breakfast bar wrappers! Or Capt. Skyking brand Starling!
meh
I promise you they will have it working in a week.
I remember when scientists used to visit this site.
We still do.
I remember a time when people didn't dismiss actual research as BS because they made sure to they knew what they were reading about first. Actually, no, I don't... the internet has always had a decent sized chunk of people who jump at the chance to call something BS they don't like and then frequently support some BS they do like with equal lack of scrutiny or actual examination.
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I can start making Schrodinger's Lolcats. Until you open the link, you don't know if its funny or not.
I still have more fans than freaks. WTF is wrong with you people?
Looks like Europe and China are technologically ahead of the US in this area
There is zero need, zero benefit and zero possibility of actually creating more than small demonstration.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
Did you send this from the future?
I think every particle could represent a bit and you could have about 8 at a time and you would get a byte of data sent. Then just time it like clockworks to sent a long string of data. It is instantaneous not just secure.
Now we can be at war with Eastasia and allied to Eastasia at the same time!
Don't know the capacity of present day photon traps, but if they could squeeze in say a couple of petabytes of those quantum entangled photons simultaneously into two photon traps at location A, then FedEx one photon trap to location B, then as I understand it, you would enjoy 1 GBit/s instantaneous IPv4/IPv6 between location A and B (regardless of distance) for say one year. I.E. digging that new Atlantic cable might not be the only option for achieving even higher speed stock trading...
Does anyone else but me realize we're building a massive neural net computer that functions much like a human brain does from the inside out?
The scale is enormous, obviously, a brain the size of a planet.
Thank you, for rebuilding my brain. I didnt ask for this, but I appreciate it.
"but the pad must be as long as the message" hence the "one-time" part.
How susceptible to DoS attack is this set up anyways ? Real talk.
I always thought that using a one time pad could use something like a simplified key. Take a irrational number like Pi, and then use an offset and size (length) for the pad instead of the whole key.
The critical part of a one-time pad is that each bit of the key is truly random: there is one bit of entropy for each bit in the key. Anything less amounts to reusing bits from the key, so it's no longer "one-time". What you've described is essentially a form of pseudo-random number generator, with the offset into Pi as the seed. A PRNG can form the core of a symmetric encryption algorithm—just XOR the pseudo-random bit-stream with the message—but it isn't a one-time pad because the entropy of the PRNG output is limited by the entropy of the seed.
For example, the offset in your example would only require a brute-force search through an approximately 56-bit key space (the first 2^56 digits of Pi). If the message is much longer than 56 bits, and not random, then a brute-force search is likely to be able to distinguish the correctly decrypted plaintext from random noise. If there are patterns in the PRNG output it may be possible to take shortcuts and reduce the search time. A true one-time pad has a key for every possible combination of plaintext and ciphertext, so a brute-force search cannot tell you which key was used, or which message was actually sent, and there are no patterns for cryptoanalysis to take advantage of.
"The state is that great fiction by which everyone tries to live at the expense of everyone else." - Bastiat
The Tortoise and the Hare.... So which side of entanglement will get there first?
If you're on the Quantum Internet and you download a file with 800 mega qubytes, you can turn this into an iso image of any CDDA ever produced!
Because Quantum Entanglement is not in the bible.
"...and god said, 'Let there be photons. And there were photons.'"
“In the beginning, there was nothing. Then God said, 'Let there be light'... and there was still nothing but, you could see it." :: Groucho Marx
Signatures are a waste of bandwi (buffering...)
So...they're hoping to make a 'Quantum Leap' http://instantrimshot.com/
Insert_Ending_Here
You raise a good point. QKD ensures that you share the key with exactly one peer; it doesn't say anything about who that peer is. If, rather than simply eavesdropping, someone managed to redirect the channel to their own equipment, you could end up sharing the key with the attacker rather than the intended recipient.
For this reason, all QKD protocols require an authentic (but public) classical communication channel in addition to the eavesdropping-evident quantum channel. Once the peer has been authenticated, QKD can be used to arrange a shared authentication key for the next exchange. The first exchange, however, must be authenticated through more traditional means.
"The state is that great fiction by which everyone tries to live at the expense of everyone else." - Bastiat