| （英） |
In QKD using WCP sources, PNS attack exploiting multiphoton pulses affects security of the system. Decoy method can be used to counteract this issue, but it is known that knowledge of photon number distribution is acquired for application. Previously, it has been assumed that the photon number distribution of WCP sources follows Poisson distribution. To ensure the security of QKD, there is a need to establish experimental evaluation methods to verify this assumption. In this study, we experimented with two different approaches to evaluate photon number distribution of pulse laser. |