A PSK quantum-noise randomized cipher simulation system model based on standard commercial devices

摘要

On the basis of industry-standard devices, a Phase-Shift Keying (PSK) quantum-noise randomized cipher anti-interception transmission simulation system model with 10 Gb/s single-channel transmission over 198 km is simulated in this paper. The effect of the core parameters on the system transmission capability are estimated in consideration of bit error rate. The results show that the greater the transmission distance or rate, or the lower the average photon number, the worse the transmission performance becomes. However, the level number of M-ary signal (M) has little effect on the transmission performance, leading us to analyze the impact of M on system security. The eye diagram for an eavesdropper becomes worse with the increase of M. Therefore, legitimate users can achieve excellent security performance by advancing M without affecting transmission performance too much.