摘要
The decoy state protocol was proposed to overcome the primitive photon number splitting attack.When using a better strategy,the attacker can ensure that the ratio of the overall gain of the signal state pulse against the decoy state pulse changes very little,even to keep the overall gain of the signal state pulses equal to that obtained without attacker.In this paper we first give a model of the partial photon number splitting attack which contains the original one,and then find that the decoy state protocol still works effectively under the partial photon number splitting attack.
The decoy state protocol was proposed to overcome the primitive photon number splitting attack. When using a better strategy, the attacker can ensure that the ratio of the overall gain of the signal state pulse against the decoy state pulse changes very little, even to keep the overall gain of the signal state pulses equal to that obtained without attacker. In this paper we first give a model of the partial photon number splitting attack which contains the original one, and then find that the decoy state protocol still works effectively under the partial photon number splitting attack.
基金
supported by the National Basic Research Program of China(2011CBA00200 and 2011CB921200)
the National Natural Science Foundation of China(60921091 and 61101137)
China Postdoctoral Science Foundation(2012M511419)
Technology projects funded of State Grid Corporation(XX17201200028)
关键词
攻击者
光子数
诱骗
分束
协议
安全性
脉冲信号
无信号
photon number splitting attack, quantum key distribution, decoy state, overall gain, security
