Two semi-quantum secure direct communication protocols based on Bell states

被引:32
|
作者
Sun, Yuhua [1 ]
Yan, Lili [1 ]
Chang, Yan [1 ]
Zhang, Shibin [1 ]
Shao, Tingting [1 ]
Zhang, Yan [1 ]
机构
[1] Chengdu Univ Informat Technol, Sch Cybersecur, Chengdu 610225, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
Quantum cryptography; quantum secure direct communication; semi-quantum protocols; Bell states; KEY DISTRIBUTION; CRYPTOGRAPHY;
D O I
10.1142/S0217732319500044
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Quantum secure direct communication allows one participant to transmit secret messages to another directly without generating a shared secret key first. In most of the existing schemes, quantum secure direct communication can be achieved only when the two participants have full quantum ability. In this paper, we propose two semi-quantum secure direct communication protocols to allow restricted semi-quantum or "classical" users to participate in quantum communication. A semi-quantum user is restricted to measure, prepare, reorder and reflect quantum qubits only in the classical basis {vertical bar 0 >,vertical bar 1 >}. Both protocols rely on quantum Alice to randomly prepare Bell states, perform Bell basis measurements and publish the initial Bell states, but the semi-quantum Bob only needs to measure the qubits in classical basis to obtain secret information without quantum memory. Security and qubit efficiency analysis have been given in this paper. The analysis results show that the two protocols can avoid some eavesdropping attacks and their qubit efficiency is higher than some current related quantum or semi-quantum protocols.
引用
收藏
页数:10
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