诱骗态量子密钥分发系统中的隐蔽欺骗方法

在应用环境可信的情况下,诱骗态量子密钥分发系统具有明确的安全性架构.但是,在不可信的应用环境中,通信一方可以利用诱骗态量子密钥分发系统为第三方隐蔽地窃听开启方便之门.这种不暴露自己的泄密行为是一种隐蔽欺骗.诱骗态量子密钥分发系统具有一定的冗余系统参数（比如接收端设备对光信号的波长和强度的细微变化不敏感,但是系统安全性与这些参数密切相关）,不可信终端通过改变不同信号光脉冲的波长或强度,将为窃听者成功进行基于波分复用或分束攻击的隐蔽窃听提供可能性.这种隐蔽欺骗将直接破坏通信终端之间的信任关系,进而导致通信过程保密性的不可信,这给量子通信系统终端的可信性和安全性提出了一定的挑战.

Undiscovered Cheatings in Decoy-State Quantum Key Distribution System

Decoy states quantum key distribution system is secure if the two communicators are trusty. However, one can help Eve to successfully eavesdrop their secure information by opening a ＂back door＂ secretly in Decoy states quantum key distribution system if one user is not trusty. Such an undiscovered secret leakage is called undiscovered cheating. It is possible for untrusty user to do undiscovered cheating if QKD system still has some unsettled redundancies, such as small changes in wavelength and pulse in- tensities. Undiscovered cheating will destroy the trusty relationship between two communicators, and make the secure communication process untrustful, which is a new challenge to build a trusty QKD system.