A measurement device independent multi-party quantum key agreement protocol with identity authentication

Multi-party quantum key agreement (MQKA) is a significant technique for generating shared keys among multiple participants in a secure and fair manner but dealing with imperfect quantum measurement devices presents practical challenges. In this paper, we propose a feasible measurement device independent multi-party quantum key agreement (MDI-MQKA) protocol with identity authentication, based on the BB84 polarization states and the GHZ entangled states. In our proposed MDI-MQKA protocol, participation is restricted to authenticated individuals, avoiding the possibility of impersonating participants. Following the execution of MDI-MQKA, each authenticated participant can acquire their respective private keys in a fair manner, with the assistance of the third party. We analyze and prove the correctness, feasibility of authentication, security, and fairness of the proposed MDI-MQKA protocol in detail. The proposed MDI-MQKA protocol represents a promising investigation into MQKA protocols and measurement device independent technologies, which can help advance the practical application of quantum information technology.

Automated summary

This paper proposes a feasible measurement device independent multi-party quantum key agreement protocol with identity authentication, based on BB84 polarization states and GHZ entangled states. The proposed protocol ensures security, fairness, and feasibility of key generation by restricting participation to authenticated individuals.