密码学报2018，Vol.5Issue(1)：1-12,12.DOI:10.13868/j.cnki.jcr.000213
针对诱骗态量子密钥分发方案的PNS攻击研究
Analysis on Photon-number-splitting Attack Against Decoy-state Quantum Key Distribution Schemes
摘要
Abstract
The fast development of quantum secure communication technology shows great ap-plication potentiality of quantum cryptography in communications. Quantum cryptography takes advantage of quantum's physical property to ensure unconditional security. However, in practical communication systems,the imperfection of photon sources and other devices brings safety loopholes.Photon-number-splitting (PNS) attack can obtain the secret key by taking advantage of imperfect photon sources of some quantum key distribution systems. This paper first reviews the current development and basic principle of PNS attack. Then, it presents an analysis on the key technology of an improved PNS attack. Based on the above analysis, the traditional PNS attack is improved by presenting a new attack, by which an eavesdropper can legally control the count rate of various pulse intensities at the receiving end so that it remains unchanged. Meanwhile, considering the practicability of the attack, photon pulses intensities are divided into several security intervals, each interval computes a beam splitter efficiency to insure receiver's count to be unchanged, so that the attack cannot be detected. Finally, with the help of MATLAB, the fitting function of beam splitter and light intensity is computed, and through numerical simulation and number optimization, this paper shows the feasibility of the proposed attack.关键词
量子密钥分发/诱骗态/PNS攻击/安全区间/分数器效率Key words
quantum key distribution/decoy-state/photon-number-splitting(PNS)attack/security interval/beam splitter's efficiency分类
信息技术与安全科学引用本文复制引用
李宏欣,迟洋广,韩宇,闫宝,王伟..针对诱骗态量子密钥分发方案的PNS攻击研究[J].密码学报,2018,5(1):1-12,12.基金项目
国家自然科学基金项目 (61472446, 61701539) （61472446, 61701539）
数学工程与先进计算国家重点实验室开放课题项目 (2016A01) National Natural Science Foundation of China (61472446, 61701539) （2016A01）
Open Fund of State Key Labo-ratory of Mathematical Engineering and Advanced Computing (2016A01) （2016A01）
