连续变量量子密钥分发实际安全性研究进展

doi:10.3969/j.issn.1671-1122.2017.11.002

摘要/Abstract

摘要：

连续变量量子密钥分发(CVQKD)技术因其具有潜在高码率及与经典光通信良好融合性的特性,受到社会各界的广泛关注,近十几年来得到了迅速的发展。目前高斯调制CVQKD协议在理论上已经被证明具有无条件安全性。然而对于一个实际CVQKD系统,其各个硬件及软件子系统、模块不可能具有理论上的完善性,这些非理想特性一方面会导致系统实际运行安全密钥率的降低,另外还可能引入具体的黑客攻击,导致系统不再安全运行。文章分别从系统非理想特性对实际运行安全性的影响以及引入的具体攻击策略两个方面介绍了目前国内外针对CVQKD系统实际安全性的研究进展情况,并对该研究方向提出了展望。

关键词: 连续变量, 量子密钥分发, 实际安全性

Abstract:

Continuous-variable quantum key distribution (CVQKD) technique owns the advantages of potential high secret key rate and excellent compatibility with classical optical communication technique. It has attracted much attention and has been developed rapidly in the past decades. Now the unconditional security of theoretical Gaussian-modulated CVQKD protocol has been fully proven. However, for a practical CVQKD system, its hardware and software cannot be theoretically perfect. In one aspect, these imperfections will lower the secure secret key rate of the CVQKD system and incur security problems. In the other aspect, they can be used by Eve to implement hacking attacks to hide her intercept-resend attack without being detected by the legitimated parties. In this paper, we take a review of the worldwide development of the study on practical security of CVQKD from two aspects, i.e., the influence of imperfections of practical CVQKD system on its operational security and the concrete attacks incurred by these perfections. Moreover, a brief prospection is given for the study of practical security of CVQKD.

Key words: continuous-variable, quantum key distribution, practical security

中图分类号:

TP309.1

黄鹏, 曾贵华. 连续变量量子密钥分发实际安全性研究进展[J]. 信息网络安全, 2017, 17(11): 7-12.

Peng HUANG, Guihua ZENG. The Development of Study on Practical Security of Continuous-variable Quantum Key Distribution[J]. Netinfo Security, 2017, 17(11): 7-12.

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