概率致盲攻击模型下被动诱骗态量子密钥分发安全性分析

在量子密钥分发(QKD)系统实现的过程中,非理想的器件会使整个系统的安全存在一定隐患,比如攻击者可以针对非理想的单光子探测器发起致盲攻击,通常通过监测电流以发现致盲攻击.针对这一防御策略,人们又提出了概率致盲攻击,在不引起系统电流明显改变的前提下窃取部分密钥信息.诱骗态方案是现在QKD系统中普遍使用的方案,其中被动诱骗...

Security Analysis of Quantum Key Distribution with the Passive Decoy-State Method Under Probabilistic Blinding Attack Model

In the actual quantum key distribution (QKD) system, the imperfect equipment will bring great challenges to the security and implementation of the scheme. The decoy state can effectively resist the photon number separation attack, among which the passive decoy state scheme has more advantages in security and realization. However, the blind attack caused by the imperfection of the single photon detector still brings great security risks to the QKD system. Although traditional blinding attacks can be found by direct current detection, probabilistic blinding attacks can still steal some key information. In this paper, the influence of probabilistic blinking attacks on passive deceptions based on weakly coherent state light sources is studied, and the secret key rate formulas of passive deceptions are given in the case of probabilistic blinking attacks with both infinite-length and finite-length key.