Controlled Secure Direct Communication by Using GHZ Entangled State

Chang-Bao Fu; Chung-In Um; Feng-Yue Li; Kyu-Hwang Yeon; Shou Zhang; Yan Xia

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Controlled Secure Direct Communication by Using GHZ Entangled State

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arxiv quant-ph/0601145 v1 pith:PUJYD2VT submitted 2006-01-21 quant-ph

Yan Xia , Chang-Bao Fu , Feng-Yue Li , Shou Zhang , Kyu-Hwang Yeon , Chung-In Um This is my paper · ORCID

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keywords communicationentangledcontrolleddirectlocaloperationsprotocolsecure

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We present a controlled secure direct communication protocol by using Greenberger-Horne-Zeilinger (GHZ) entangled state via swapping quantum entanglement and local unitary operations. Since messages transferred only by using local operations and a public channel after entangled states are successfully distributed, this protocol can protect the communication against a destroying-travel-qubit-type attack. This scheme can also be generalized to a multi-party control system.

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