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Measurement-device-independent quantum key distribution (MDI QKD) is a promising and practical protocol for remote secret sharing, where the Hong-Ou-Mandel (HOM) type interference in the measurement side provides a simple and economic way to resist malicious attacks on the measurement devices. Because the HOM interference greatly indicates the performance of MDI QKD system, its interferential behavior...
The purpose of reconciliation, one of classical aspects of quantum key distribution (QKD) protocol, is to mitigate errors after the distribution of quantum information over a quantum channel. In this paper, a rate-adaptive method is proposed by means of a channel coding scheme where specific low-density parity-check (LDPC) codes are adapted in the Slepian-Wolf coding system. Puncturing and shortening...
Quantum secret sharing is a important problem in the quantum cryptography. We analyzed two kinds of practical quantum secret sharing protocols without entanglement. And their combination could be a basic unit in the quantum secret sharing network, which is potential in practical applications.
A hierarchical metropolitan quantum cryptography network upon the inner-city commercial telecom fiber cables is reported in this paper. The techniques of the quantum router, optical switch and trusted relay are assembled here to divide the seven-user network into a four-node backbone net, a two-user subnet and a single-fiber access link. Secure keys distributed in this network can be utilized to encrypt...
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