Quantum Mutual Authentication Key Agreement Scheme Using Five-Qubit Entanglement towards Different Realm Architecture

In this paper, we propose a scheme of quantum operation teleportation (QOT) utilizing local operations and five-qubit entangled state to achieve mutual authentication and key agreement for two clients in different realms. On the one hand, the scheme not only has the characteristics of the arbitrariness of the relevant operation, the certainty of sharing success and the constancy of entangled resources, but also realizes the mutual authentication among the four parties, ensuring the reliability and security of the task. On the other hand, considering the complexity of the operation, we complete the current QOT task as a whole, so the operation difficulty is low and relatively simple. In summary, our analysis is completely feasible under the existing technical conditions and this proposed scheme has practical significance.