A generalized architecture of quantum secure direct communication for N disjointed users with authentication

摘要

In this paper, we generalize a secured direct communication process between Nusers with partial and full cooperation of quantum server. The securityanalysis of authentication and communication processes against many types ofattacks proved that the attacker cannot gain any information duringintercepting either authentication or communication processes. Hence, thesecurity of transmitted message among N users is ensured as the attackerintroduces an error probability irrespective of the sequence of measurement.