Secret-Key Provisioning With Collaborative Routing in Partially-Trusted-Relay-based Quantum-Key-Distribution-Secured Optical Networks

• DOI: 10.1109/jlt.2022.3153992
• Publication Date: 2022-02-24T20:26:42Z
• Authors: Xiaosong Yu; Yuhang Liu; Xingyu Zou; Yuan Cao; Yongli Zhao; Avishek Nag; Jie Zhang
• Keywords: Quantum key distribution; Provisioning; Repeater (horology); Secure Communication

Quantum Key Distribution (QKD) is a promising technology that provides proven unconditional security based on fundamentals of quantum physics, especially for point-to-point communications. It could be applied in large-scale optical networks long-distance key provisioning mainly by three relaying methods: quantum-repeater-based QKD, trusted-relay-based and measurement-device-independent QKD (MDI-QKD). However, still under study because the immature technologies such as preliminary memory. The vulnerable since insecurity non-ideal single-photon sources detectors cannot ignored practical applications. On other hand, MDI-QKD, there exists limitation its rate According to these limitations, embedding protocols like MDI-QKD into existing secured (QKD-ON) with usage untrusted relays key-provisioning scheme. In this paper, we partially-trusted relay scenarios focus routing keys different kinds typical network topologies. A partially-trusted-relay-based method described, which can allow pair nodes sharing secret coexistence trusted relays. secret-key collaborative ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">SKP-CR</i> ) algorithm proposed search optimal key-relay path. We perform simulations proportion versus relays, initial pools (QKPs), traffic load. verify significantly outperform conventional scheme terms key-distribution success an improvement up xmlns:xlink="http://www.w3.org/1999/xlink">62%</i> mesh topology.