Mutual Trust Evaluation Model in Quantum Distributed Communication Network

Quantum communication networks are gradually moving toward practicality, and giving rise to the rapid development of quantum information industry. The decentralized quantum distributed communication network (QDCN) based on quantum node information transfer can meet more realistic scenarios, such as direct node information interaction. However, the prerequisite for two nodes to complete secure and stable communication is the establishment of mutual trust evaluation between nodes. In this paper, a practical mutual trust evaluation model in QDCN is proposed to enhance node's privacy and security. Only Bell states measurement and two-qubit projective measurement are needed to complete the trust evaluation between two communication nodes. The quantum circuit diagram required for model building is presented, and the security analysis proved that this model has a better privacy and security performance and higher particle efficiency.