title: Biased decoy-state measurement-device-independent quantum cryptographic conferencing with finite resources.
abstract: In recent years, a large quantity of work have been done to narrow the gap between theory and practice in quantum key distribution (QKD). However, most of them are focus on two-party protocols. Very recently, Yao Fu et al proposed a measurement-device-independent quantum cryptographic conferencing (MDI-QCC) protocol and proved its security in the limit of infinitely long keys. As a step towards practical application for MDI-QCC, we design a biased decoy-state measurement-device-independent quantum cryptographic conferencing protocol and analyze the performance of the protocol in both the finite-key and infinite-key regime. From numerical simulations, we show that our decoy-state analysis is tighter than Yao Fu et al. That is, we can achieve the nonzero asymptotic secret key rate in long distance with approximate to 200km and we also demonstrate that with a finite size of data (say 1011to 1013signals) it is possible to perform secure MDI-QCC over reasonable distances.
authors.forename: RuiKe
authors.initials: R
authors.lastname: Chen
authors.forename: WanSu
authors.initials: W
authors.lastname: Bao
authors.forename: Chun
authors.initials: C
authors.lastname: Zhou
authors.forename: Hongwei
authors.initials: H
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.forename: HaiZe
authors.initials: H
authors.lastname: Bao