Fig. 2
From: Improved security bound for the round-robin-differential-phase-shift quantum key distribution
Secret key rate R versus channel loss. R1 and R2 represent the original RRDPS protocol and the proposed one, respectively. The line for BB84 is not drawn since its key rate is always 0 in this case. Both R1 and R2 are simulated for the scenarios without monitoring signal disturbance
