Thermal Noise makes Quantum Cryptography obselete?
The New Scientist (and slashdot) reports that a very simple method that basically achieves what million dollars Quantum Cryptography set out to achieve: unbreakable two-way communication due to Laszlo Kish.
Bruce Schneier describes it in those terms:
How would you feel if you invested millions of dollars in quantum cryptography, and then learned that you could do the same thing with a few 25-cent Radio Shack components?
And he concludes:
Basically, if Kish’s scheme is secure, it’s superior to quantum communications in every respect: price, maintenance, speed, vibration, thermal resistance and so on.
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