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Two perfect quantum teleportation schemes for an unknown single-particle pure state and an arbitrary two-particle pure entangled state are proposed by using four-particle cluster state in this paper. As it is shown, the unknown single-particle pure state or the arbitrary two-particle pure entangled state can be teleported perfectly. The successful possibilities are both 100% and quantum channel fidelities...
Multi-party quantum secret sharing scheme with high efficient based on entanglement states is proposed and analyzed. A three-party which is presented shares a sequence of joint key bits. In this scheme, a general proof of the security against eavesdropping for three-party quantum secret sharing based on entanglement swapping is provided. The scheme which is showed is secure against a dishonest participant's...
A protocol for three-party quantum secure direct communication using entanglement states is proposed. In this protocol, three participants simultaneously exchange their messages. The protocol is shown to stand against the intercept-and-resend attack, the intercept-and-measure attack, the intercept-and-entangle auxiliary attack and the denial-of-service attack. It can be generalized to N-party case...
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