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Is Quantum Encryption Really Unbreakable?

02/01/2009 8:02 PM

A recent experiment/research article (http://www.iop.org/EJ/abstract/1367-2630/10/12/123006) proved that removing a single quantum from a coherent beam can be done without destroying the coherent state and will only lower its amplitude. Because destruction of coherency was what was to keep quantum encrypted transmission safe, will this discovery allow quantum taps?

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#1

Re: Is Quantum Encryption Really Unbreakable?

02/03/2009 1:04 AM

i think that heisenberg comes into play and what does the single quantum say data wise of the beam?

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#2
In reply to #1

Re: Is Quantum Encryption Really Unbreakable?

02/03/2009 4:31 AM

I'm up, no I'm down

Without the decoder to interpret what the spin state means it will not matter unless you can get a large enough percentage of data to figure it out.

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#4
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Re: Is Quantum Encryption Really Unbreakable?

02/04/2009 6:50 PM

Yes, Zepplin, you may be right. I should have titled this "Quantum communication: tappable and therefore hackable", but I screwed up. Either way, with a tap this simplifies the expression to normal computer encryption, and these are hackable. Do you know if I can change the title?

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#3
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Re: Is Quantum Encryption Really Unbreakable?

02/04/2009 6:47 PM

Since the beam is coherent is says everything about the beam

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#5
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Re: Is Quantum Encryption Really Unbreakable?

02/04/2009 7:25 PM

you mean it is like a perfect copy? (then it is still encrypted)

or a part of the data? i am little bit rusty on the whole quantum theory

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#6
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Re: Is Quantum Encryption Really Unbreakable?

02/04/2009 8:13 PM

Yep, it will be a perfect copy, but will still be encrypted.

Read the post above to UV. I realized the title of this post sucked, its my first posted discussion,

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#7
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Re: Is Quantum Encryption Really Unbreakable?

02/05/2009 8:49 PM

As a first post it could have been much worse. At least it was interesting. Entanglement was such a headache to Einstein it is my understanding he refused to think about it.

I think current entanglement is going in the wrong direction but I don't understand the math well enough to follow the current justifications.

Brad

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