学術雑誌論文

学術雑誌論文

Quantum Information Processing. 2024, 23(7), p. 253

Quantum conference key agreement based on differential-phase-shift quantum key distribution

Springer

英語

2024-06-24

https://doi.org/10.1007/s11128-024-04453-3

The version of record of this article, first published in Quantum Information Processing, is available online at Publisher’s website: https://doi.org/10.1007/s11128-024-04453-3.

A quantum conference key agreement (QCKA) protocol based on differential-phase-shift quantum key distribution is presented, which provides a common secret key for secure communication between more than two parties. In the proposed protocol, one party simultaneously broadcasts a weak coherent pulse train with {0, π} phases to multiple parties that measure the phase differences between adjacent pulses using a delay interferometer followed by photon detectors, and the transmitter and receivers share secret key bits from the coincident counts in the receivers. The system setup and operation are simpler than those of conventional QCKA schemes that use a multipartite quantum entanglement state. The key creation performance is evaluated by considering the eavesdropping probability. The results indicate that the proposed scheme offers better performance than the conventional entanglement-based QCKA system.

This article is licensed under a Creative Commons Attribution 4.0 International License.

98093

Quantum conference key agreement based on differential-phase-shift quantum key distribution

Springer

英語

2024-06-24

Quantum Information Processing

23

7

253

https://doi.org/10.1007/s11128-024-04453-3

https://hdl.handle.net/11094/98093