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| 1 | 量子安全直接通信原理与研究进展显示文摘量子安全直接通信是一种在量子信道中直接传输秘密信息的通信模式。量子安全直接通信改变了保密通信的体系结构,将现有保密通信的密钥分发和密文传输双信道结构改变为仅有一条量子直通信道的单信道结构,减少了泄露环节,提高了安全性。量子安全直接通信是对通信理论的发展,将基于Shannon(香农)信息论的噪声信道下可靠通信发展为基于Wyner(怀纳)搭线信道理论的噪声和窃听信道下安全和可靠通信。通过介绍量子安全直接通信的原理及特点、基于单光子和纠缠光子对的两种典型量子安全直接通信协议,综述了近年来量子安全直接通信的重要进展,展望了其发展前景。 | 龙桂鲁 | 2020 | 信息通信技术与政策2020，，7： | 6 |
| 2 | Cryptanalysis and improvement of several quantum private comparison protocols显示文摘Recently, Wu et al(2019 Int. J. Theor. Phys. 58 1854) found a serious information leakage problem in Ye and Ji’s quantum private comparison protocol(2017 Int. J. Theor. Phys. 561517), that is, a malicious participant can steal another’s secret data without being detected through an active attack means. In this paper, we show that Wu et al’s active attack is also effective for several other existing protocols, including the ones proposed by Ji et al and Zha et al(2016 Commun. Theor. Phys. 65 711;2018 Int. J. Theor. Phys. 57 3874). In addition,we propose what a passive attack means, which is different from Wu et al’s active attack in that the malicious participant can easily steal another’s secret data only by using his own secret data after finishing the protocol, instead of stealing the data by forging identities when executing the protocol. Furthermore, we find that several other existing quantum private comparison protocols also have such an information leakage problem. In response to the problem, we propose a simple solution, which is more efficient than the ones proposed by Wu et al, because it does not consume additional classical and quantum resources. | Zhao-Xu Ji Pei-Ru Fan Huan-Guo Zhang Hou-Zhen Wang | 2020 | Communications in Theoretical Physics2020，72，8： | 1 |
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