Extending the Reach of QKD Using Relays

Details Extending the Reach of QKD Using Relays Extending the Reach of QKD Using Relays

2012-03-03

arxiv.org/abs/1203.0628v1

Proc IEEE GCC Conference, pp.140-142 (2011)

Physics

Quantum Physics

Scientific paper

One of the obstacles to deployment of QKD solutions has been the distance limitation. Solutions using relays have been proposed but these rely on link-by-link key establishment. We present a new technique to extend the distance of a quantum key distribution channel using an active relay. Each relay acts as an intercept/resend device and allows the establishment of an end-to-end key. It has been argued that such relays cannot be used to extend the distance, but we show that with a suitable adaptation of the protocol the effective key distribution distance can be increased.

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