2021/09/07 by Guan-Jie Fan-Yuan, Feng-Yu Lu, Shuang Wang +7 · 1 citation
Physics and Astronomy · Computer Science · #quant-ph #cs.CR #physics.optics
paper · pdf · doi:10.1364/prj.428309
published as Photon. Res. 9, 1881-1891 (2021)
arxiv created 2021/09/07 · arxiv updated 2021/09/08
Untrusted node networks initially implemented by measurement-device-independent quantum key distribution (MDI-QKD) protocol are a crucial step on the roadmap of the quantum Internet. Considering extensive QKD implementations of trusted node networks, a workable upgrading tactic of existing networks toward MDI networks needs to be explicit. Here, referring to the nonstandalone (NSA) network of 5G, we propose an NSA-MDI scheme as an evolutionary selection for existing phase-encoding BB84 networks. Our solution can upgrade the BB84 networks and terminals that employ various phase-encoding schemes to immediately support MDI without hardware changes. This cost-effective upgrade effectively promotes the deployment of MDI networks as a step of untrusted node networks while taking full advantage of existing networks. In addition, the diversified demands on security and bandwidth are satisfied, and network survivability is improved.