Quantum crypto backdoor closed

Friday, 23 February 2007, 12:18 AM EST

Researchers believe they have secured a potential backdoor in a cryptography technique known as Quantum Key Distribution (QKD).

The QKD method involves the use of laser diodes to transmit crypto keys along fibre optic lines as streams of light quanta Ė individual photons. Any attempt to eavesdrop on the transmission involves measuring it in some way at a quantum level, which will necessarily alter the transmitted data and reveal to the communicating parties that the key is compromised.

At The Register.

[ Read more ]




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