Quantum key distribution (QKD) is a secure communication method that implements a cryptographic protocol involving components of quantum mechanics. It enables two parties to produce a shared random secret key known only to them, which then can be used to encrypt and decrypt messages .

2024年3月3日 · QKD graph is associated with QKD buffer, allowing graph plotting on each node with associated QKD link and QKD buffer. QKD Graph creates separate PLT and DAT files suitable for plotting using a popular Gnuplot tool in PNG, SVG, or EPSLATEX format.

2020年5月26日 · Schematic diagram of decoy-state QKD. In a decoy-state BB84 transmitter, the optical pulses are normally generated with phase-randomized laser pulses. Decoy states are prepared using an amplitude modulator (AM). PM, phase modulator for phase randomization; PolM, polarization modulation for encoding; , optical filter; , optical isolator.

Quantum key distribution allows remote parties to generate information-theoretic secure keys. The bottleneck throttling its real-life applications lies in the limited communication distance and key generation speed, due to the fact that the information carrier can be easily lost in the channel.

2019年9月15日 · The chapter starts with description of key differences between conventional cryptography , classical physical-layer security (PLS), and QKD . In section on QKD basics, after historical overview, we review different QKD types and describe briefly common postprocessing steps, namely, information reconciliation and privacy amplification steps.

5 天之前 · This schematic diagram shows the quantum key distribution experiment of the Jinan-1 micro-nano satellite. (University of Science and Technology of China/Handout via Xinhua) ... "One of the Jinan-1 satellite's advances is its ability to enable real-time QKD," said Liao Shengkai, a co-author of the paper and the leader of the Jinan-1 project from ...

In this paper, we first develop a novel model dedicated to large-scale QKD networks, some of whose nodes could be eavesdropped secretely. Then, we investigate the key transmission problem in the...

Designing optimal measurement operators for quantum state discrimination (QSD) is an important problem in quantum communications and cryptography applications. Prior works have demonstrated that...

2 天之前 · Mode-pairing quantum key distribution (MP-QKD) leverages post-selection pairing strategy to achieve a balance between ease of implementation and high performance, establishing itself as a highly promising protocol in future QKD networks. However, the reliance on pairing strategies causes a considerable number of pulses to be excluded from parameter estimation and key generation, introducing ...

2 天之前 · The reviewer also noted that “it demonstrates the maturity of satellite QKD technology and represents a milestone for the realization of a satellite constellation for quantum and classical communication.” Schematic diagram of the quantum key distribution experiment between the quantum microsatellite Jinan-1 and ground stations. (Image by USTC)