Multi-party Semi-quantum Key Agreement with Delegating Quantum Computation |
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Authors: | Wen-Jie Liu Zhen-Yu Chen Sai Ji Hai-Bin Wang Jun Zhang |
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Institution: | 1.Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET),Nanjing,People’s Republic of China;2.School of Computer and Software,Nanjing University of Information Science & Technology,Nanjing,People’s Republic of China;3.Jiangsu Engineering Center of Network Monitoring,Nanjing University of Information Science & Technology,Nanjing,People’s Republic of China;4.School of Information Engineering,Jiangsu Maritime Institute,Nanjing,People’s Republic of China |
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Abstract: | A multi-party semi-quantum key agreement (SQKA) protocol based on delegating quantum computation (DQC) model is proposed by taking Bell states as quantum resources. In the proposed protocol, the participants only need the ability of accessing quantum channel and preparing single photons {|0〉, |1〉, |+〉, |?〉}, while the complicated quantum operations, such as the unitary operations and Bell measurement, will be delegated to the remote quantum center. Compared with previous quantum key agreement protocols, this client-server model is more feasible in the early days of the emergence of quantum computers. In order to prevent the attacks from outside eavesdroppers, inner participants and quantum center, two single photon sequences are randomly inserted into Bell states: the first sequence is used to perform the quantum channel detection, while the second is applied to disorder the positions of message qubits, which guarantees the security of the protocol. |
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