, 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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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 an attacker to insert his own receiver and transmitter, and eavesdrop and replay the data?
How does the data become "corrupted" if it was received -- only by the attacker instead of the intended recipient -- and then replayed?
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Link to this comment: http://www.securityfocus.com/comments/articles/11046/31698#31698