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Chinese Journal of Quantum Electronics

Quantum communication based on cluster state

Zha Xin-wei

Published Jan 1, 2011• 1 citation
OpenAlex

Abstract

Cluster state quantum dialogue is proposed,which enables both legitimate parties to exchange their 4 bit secret messages in a direct way.Compared with the there-particle W states,the shemes have following advantages.After two-step security check,four-bit secret message can be transmitted to each other by transmitting of single particle with the aid of two-bit classical information.The scheme can discard the drawback of the intercept-resend attack,the entangle-measure attack,and the optimal incoherent attack.

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Cluster state quantum dialogue is proposed,which enables both legitimate parties to exchange their 4 bit secret messages in a direct way.Compared with the there-particle W states,the shemes have following advantages.After two-step security check,four-bit secret message can be transmitted to each other by transmitting of single particle with the aid of two-bit classical information.The scheme can discard the drawback of the intercept-resend attack,the entangle-measure attack,and the optimal incoherent attack.
Drawing on the idea of the quantum secure direct communication(QSDC),a novel quantum dialogue scheme based on Bell states is presented in this paper.The proposed scheme can realize authorized parties' secure exchange of their respective secret messages simultaneously only through one communication.In this scheme,a random bit string and checking particles are used to ensure the security;the scheme is secure against eavesdropper's commonly used attacks,such as intercept/resend attack,Trojan horse attack and entanglement attack.A serious problem called leakage or correlation is found in some quantum dialogue protocols,namely,any eavesdropper can elicit some information about the secret from the classical communication of the legal users.Fortunately,our protocol can discard the drawback leakage.In addition,our protocol possesses high efficiency 66.7% and is feasible.Finally,the protocol is applied to the scheme based on two-qutrit entangled states with a secure communication.
In this paper, we point out Partially Entangled States quantum dialogue, which enables both legitimate parties to exchange their 2 bit secret messages in a direct way. Two step security check guarantees the security of this protocol. Partially Entangled States used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. The protocol is secure against the intercept-resend attack and the entangle-measure attack.
In this paper, we point out Partially Entangled States quantum dialogue, which enables both legitimate parties to exchange their 2 bit secret messages in a direct way. Two step security check guarantees the security of this protocol. Partially Entangled States used as information carrier are easy to prepare and store, there is no need to transmit quantum states with secret message in quantum channel and two users can simultaneously communicate with the third party. The protocol is secure against the intercept-resend attack and the entangle-measure attack.
We present a novel protocol for deterministic secure quantum communication by using the four-qubit cluster state as quantum channel. It is shown that two legitimate users can directly transmit the secret messages based on Bell-basis measurements and classical communication. The present protocol makes use of the ideas of block transmission and decoy particle checking technique. It has a high capacity as each cluster state can carry two bits of information, and has a high intrinsic efficiency because almost all the instances except the decoy checking particles (its number is negligible) are useful. Furthermore, this protocol is feasible with present-day technique.