“Decoys fix quantum key swapping”
Posted by William Heath in Murphy's Law, cracking stuff at February 22nd, 2007
The technique uses photons of light as decoys |
British scientists have found a way to fix a vulnerability in quantum cryptographic systems.
If left unpatched the flaw would make it possible to grab information about the keys used to scramble information without being detected.
The flaw emerges because of the way that laser diodes emit the photons of light used to carry quantum key data.
Using decoy photons the researchers can spot when attackers are eavesdropping on secure communication channels.
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