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Old 04-29-2007, 07:26 PM   #1 (permalink)
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Quantum cryptography is hacked

Unhackable Quantum Cryptography gets hacked.

http://www.nature.com/news/2007/0704...070423-10.html
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Old 04-29-2007, 09:34 PM   #2 (permalink)
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Re: Quantum cryptography is hacked

So is it unhackable or not?
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Old 04-30-2007, 09:51 AM   #3 (permalink)
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Re: Quantum cryptography is hacked

Did I just detect something passing over my head?
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Old 04-30-2007, 01:07 PM   #4 (permalink)
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Re: Quantum cryptography is hacked

Quote:
Originally Posted by karusho View Post
So is it unhackable or not?
It's not unhackable but it still can't be hacked... That just doesn't sound right lol.
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Old 04-30-2007, 09:15 PM   #5 (permalink)
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Re: Quantum cryptography is hacked

The answer seems to be that it can be hacked...perhaps The answer lies in Schrodinger's cat.
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Old 05-01-2007, 05:11 AM   #6 (permalink)
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Re: Quantum cryptography is hacked

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Originally Posted by JohnthePilot View Post
The answer seems to be that it can be hacked...perhaps The answer lies in Schrodinger's cat.
Yes it does, you can never tell whether you've hacked a true quantum system because when you interfere with or 'tap' a system you change it. It's the implication of the Uncertainty Principle that you can never really know all the properties of a quantum system.

What I'm saying is that a true quantum mechanical system could be hacked but the data that was hacked wouldn't be the data that was sent, the observation itself alters the data observed.

Many quantum systems now, such as the early quantum computers, aren't true quantum systems, they have classical components that are subject to the usual computing laws etc.
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