Quantum crypto moves out of the lab

Quantum crypto moves out of the lab
John Leyden, The Register 2005-04-28

Quantum cryptography - long the stuff of cyberpunk novels and hi-tech spy stories - is leaving the laboratory and making its way into commercial markets. A briefing session at the UK's Department of Trade and Industry on Wednesday featured demonstrations of working quantum key exchange systems by QinetiQ, Toshiba Cambridge and US start-up MagiQ.

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Quantum crypto moves out of the lab 2005-04-28
Anonymous (1 replies)

Has any computer security article written on quantum cryptography ever explained how this perfect secrecy is achieved?

We're still talking about a sender, a receiver, and digital data. Without an out-of-band communication (which would defeat the purpose anyway, right?), how is it impossible for ...

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How it works 2005-05-01
Roger

Find one overview at:

http://en.wikipedia.org/wiki/Quantum_cryptography

Briefly, you are correct; to defeat a MITM attack where the MITM completely replaces one signal with another, an out of band method is used. However the security requirements for the out of band channel are much weaker than us...

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Quantum crypto looks fishy 2005-04-29
Skeptical

, but when i noticed this it immediately changed into a lemon.

I have 2 questions regarding this subject.

1. We are lead to believe that it is impossible for these photon's to be intercepted and read, yet they are able to use 'repeaters' to transmit over long distances. wont this be an interce...

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Quantum crypto moves out of the lab 2005-04-30
rhale

$70-100K is about the same cost as a 10GbE

port. Conventional Highly Encrypted Data

transmitted in VPN tunnels may be more

cost effective at this point (and has been exhaustively validated).

Another critical metric (besides speed) is

distance. Shorter distances require more repeaters (rege...

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Quantum crypto moves out of the lab 2005-05-02
Anonymous

It's certainly nice that quantum cryptography makes it impossible to eavesdrop on the communication. But what about man-in-the-middle attacks? If some attacker can 'cut the wire' and put a device in between the two open ends, which forwards traffic between both sides (while copying the data somewher...

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