Quantum cryptography now a reality

What has Einstein got anything to do with quantum cryptography (or for that matter, quantum physics)? The dude spent half of his life trying to disprove quantum mechanics. In fact, people say that quantum physics must be sound since a genius named Einstein was not able to disprove it. Maybe you wanted to praise Hisenberg?

Albert Einstein did not believe in Quantum Mechanics. Is some of his work on photoelectric effect or theory of relativity somehow involved in this?

Anything that humans engineer can be reverse engineered, worked around, broken. There is already a technique involving laser flashes that can "eavesdrop" on such secure links. As time goes by, this technique will be as secure as a 1950's scrambler telephone.

Einstein wasn't really a fan of quantum physics. He didn't believe in many of its "impossible" implications which have turned out to actually be possible and useful. note: my captcha was alkpoop which made me giggle

if the data is transferred, then it is being duplicated at each switch/router, then it can be broadcast through multiple routes and not seen by the intended recipient that it has been looked at by another. So, maybe the encryption is cool, but being able to see who looked at it is wide open still.

Unlikely Einstein would be proud as he was an opponent of quantum theory.

Everything is breakable with enough time and resources. Detecting an compromise is not the same as preventing a compromise.

Einstein didn't discover quantum physics. In fact, he was a doubter, and only grudgingly went along with it since he had no better explanation. Einstein famously said, "God doesn't play dice with the universe." Also, this may be the first time the technology has been made available commercially, but it has been done in the labs for about a decade now. Finally, this only secures the communication channel. It does nothing to help security once the bits are received and back in conventional form.

"A Norwegian University of Science student named Vadim Makarov has discovered a vulnerability in what was previously thought to be unbreakable quantum encryption. He is using a form of high intensity laser light to intercept the encrypted data stream covertly. While quantum encryption is regularly used to secure Swiss bank transactions, as well as their much publicized 2007 election results, Makarov claims it's easily hacked. He claims to have developed a black box device which he says, "turns the equipment into a puppet-box that an eavesdropper can control." " Source: http://technology.newscientist.com/article/dn14866-laser-cracks-unbreakable-quantum-communications.html

Hate to break it to you, but... http://technology.newscientist.com/article/dn14866-laser-cracks-unbreakable-quantum-communications.html

That's like saying "This car is unbreakable because it cannot be driven and thus cannot crash into anything or suddenly breakdown. And if anyone tries to move it, we'd notice." Why don't they call it un-snoopable?! I guess that doesn't sound so secure, does it? What does a thief/terrorist/prankster care if he disturbes the light or not. Intercept the info, save the data, whisker it away to a safe place and decrypt at leisure.

in fact, he was quite adamant in challenging it - the famous EPR argument... anyway, i don't know what REAL benefits this new development can bring. it's not like anyone has ever broken an AES128bit cipher. the whole point is going AROUND the encryption, not breaking it by brute forcing the key.

Heisenberg rather I'd say.

Einstein stands at the beginning of QM: he published a paper on the photoelectric effect that demonstrated that photons have both wave and particle nature - that individual photons are quantized; he published a paper on brownian motion wherein he demonstrated the essentials of statistical mechanics. Quantized EM radiation and statistical mechanics are at the base of QM. Einstein objected to the interpretation of QM that claimed there is a random component in the behaviour of matter at very small dimensions. He said the randomness interpretation was wrong. Thus his famous statement "God does not play dice". He did not say QM was wrong, and I don't think he came out against the other major school of thought about QM. He did say QM was incomplete. WTH, he admitted General Relativity was incomplete also - too many solutions most of which were clearly not descriptive of the universe we live in.

even if you know someone personally, you'll never hear every thing they ever say - and even then - if you did, people don't always say what they really think. And even if you listen in on their thoughts.......there's many levels to thinking also. That's Uncertainty - the most obvious thing of all. Basic common sense. I could post what I read / heard about qm and Einstein too - but it's all second hand info, just like what everyone else has written. Second hand info based on things said - to the press!

Einstein did do research on photons, so yeah he might not have supported some conclusions of others but you could argue he's part of the foundation. In regards to the "god doesn't play dice" what einstein argued was that there is/was an as-of-yet unknown logical set of rules applying to the observed inconclusiveness, which is still possibly true since we are still discovering new forces and elementary particles and adjusting theories all the time.

Funny enough the Einstein-Podolski-Rosen experiment, although originally destinated to refute QM, is the seminal work that put the basis for the potential use of QM in cryptography. Don't know if the author of the article knew this or was just a lucky call.

In the context of the comments braying "Einstein said X, Y or Z about QM", I am in context.

Oh boys, and girls, naturally, too Einstein really did not believe in this so called hidden factor in QM. We do not know, till yet, what it is or if there is any. Please, look at David Boehm's writings: already early 1924. I try to study more. The unswer is Great Unknown. Understood, my opinion so. Good day. J