Quantum hacking of two-way continuous-variable quantum key distribution using Trojan-horse attack

Ma Hong-Xin^{1, 2}, Bao Wan-Su^{1, 2, †,}, Li Hong-Wei^{1, 2}, Chou Chun^{1, 2}

“Secret key rate” of the two-way CVQKD protocol against Trojan-horse attack as a function of the transmittance of the channel for n_c = 0,0.1,0.2,0.4,0.6. The curve is plotted for V = V_A = 16, ε = 0.65, β = 0.9, T_A = 0.7.