摘要
理论上,量子密钥分发可以带来绝对安全的保密通信.但是真实系统的量子密钥分发的安全性需要进一步证明.现有的基于弱相干态的量子密码实验在光子数分离攻击下是完全不安全的.诱骗信号方案(decoy-statem ethod)及纠缠对分发方案可以实现基于现有技术的、真实系统的绝对安全量子密钥分发.
In principle, quantum key distribution (QKD) can be used to make unconditionally secure pri- vate communication. However, the security of existing real system for QKD needs to be carefully examined. Actually, the existing experiments based on weak coherent states are insecure under photon-number-splitting attack. Fortunately, the decoy-state method and the entanglement-distribution method can be used to realize the unconditionally secure QKD based on real-life system with existing technology.
出处
《物理》
CAS
北大核心
2006年第2期125-129,共5页
Physics