English

Quantum Conference Key Agreement with Photon Loss

Quantum Physics 2021-01-13 v2

Abstract

Conference key agreement (CKA) is an information processing task where more than two parties want to share a common secret key. Here, we present a loss-resilient protocol for CKA, based on redundant encoding and error correction. Our protocol provides a speed-up in transmission rate over the existing lossy CKA protocol. However, encoding and error correction come with extra cost. We show that, using photon sources with creation probability p > 0.3, our protocol's secret key rate can overcome the existing protocol's. Hence, high probability entangled photon sources are required for realistic implementation of our loss-resilient protocol.

Keywords

Cite

@article{arxiv.2101.01483,
  title  = {Quantum Conference Key Agreement with Photon Loss},
  author = {Phattharaporn Singkanipa and Pieter Kok},
  journal= {arXiv preprint arXiv:2101.01483},
  year   = {2021}
}

Comments

11 pages, 11 figures

R2 v1 2026-06-23T21:47:37.865Z