量子密钥分配协议在概率克隆/重发攻击下的安全性

The Security of Quantum Key Distribution under Probabilistic Clone/Resend Attack

该文基于概率克降理论提出了一种量子密钥分配协议的攻击策略,密钥攻击者通过概率克隆机将发送端发送的量子态进行概率克隆,并根据自已的结果重新产生一个新的量子态发送给接收端。理论计算证明了量子密钥分配协议在这种攻击策略下仍具有足够的安全性。在经典计算机上设计并仿真量子密钥分配过程,仿真结果与理论分析相吻合。

In this paper, an attack scheme based on probabilistic cloning machine is proposed, where the eavesdropper measures the quantum state from sender with a probabilitstic cloning machine, and resends the receiver a new result. It is shown that there is still an asymptotic perfect security of quantum key distribution under this attack strategy. The simulation results on classical computer are consistent with the theoretic ones.