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 10¹¹ to 10¹³ signals) it is possible to perform secure MDI-QCC over reasonable distances.

Coherent one-way quantum conference key agreement based on twin field

“…The advantages of quantum CKA over repeating QKD in quantum networks are that quantum CKA requires fewer resource qubits, transmits fewer classical bits and performs fewer rounds of error correction and privacy amplification steps, which have been illustrated by researchers [7]. After more than two decades of development, many quantum CKA protocols have been proposed [7][8][9][10][11][12][13][14][15][16][17][18][19][20], including measurementdevice-independent [8] and device-independent [15] protocols. Details can be found in the review article [21].…”

High Key Rate Quantum Conference Key Agreement With Unconditional Security

“…Besides, the measurement-device-independent CKA protocol [10] has been proposed via post-selected Greenberger-Horne-Zeilinger (GHZ) entanglement [11], [12]. It has been generalized extensively to various cases including finite size [13], [14], continuous variables [15], [16] and four users with W state [17]. Moreover, the finite-key analysis with composable security [18], device independence [19], [20] and other special cases [21]- [23] are also considered in quantum CKA.…”

Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels

“…Basic laws of quantum mechanics combined with one-time pad encryption [30] guarantee the security of multiparty quantum communication [24,31]. Currently, QCKA has been generalized to other variants both in theory [32][33][34][35][36][37][38][39][40] and experiment [41].…”