Device-independent quantum key distribution with single-photon sources

Realizing the measure-device-independent quantum-key-distribution with passive heralded-single photon sources

In this paper, we put forward a new approach towards realizing measurement-device-independent quantum key distribution with passive heralded single-photon sources. In this approach, both Alice and Bob prepare the parametric down-conversion source, where the heralding photons are labeled according to different types of clicks from the local detectors, and the heralded ones can correspondingly be...

Measurement-device-independent quantum key distribution with uncharacterized qubit sources

Device-independent quantum key distribution

Quantum key distribution allows two parties connected by a quantum channel to establish a secret key that is unknown to any unauthorized third party. The secrecy of this key is based on the laws of quantum physics. For security, however, it is crucial that the honest parties are able to control their physical devices accurately and completely. The goal of device-independent quantum key distribu...

Experimental measurement-device-independent quantum key distribution.

Quantum key distribution is proven to offer unconditional security in communication between two remote users with ideal source and detection. Unfortunately, ideal devices never exist in practice and device imperfections have become the targets of various attacks. By developing up-conversion single-photon detectors with high efficiency and low noise, we faithfully demonstrate the measurement-dev...

Optimal Device Independent Quantum Key Distribution

We consider an optimal quantum key distribution setup based on minimal number of measurement bases with binary yields used by parties against an eavesdropper limited only by the no-signaling principle. We note that in general, the maximal key rate can be achieved by determining the optimal tradeoff between measurements that attain the maximal Bell violation and those that maximise the bit corre...