Acta Optica Sinica, Volume. 39, Issue 11, 1127001(2019)
Attack and Detection on Reference-Pulse Phase of Continuous-Variable Quantum-Key Distribution
Continuous-variable quantum-key distribution based on the local-oscillator approach has been encountered with new security issues due to reference pulses transmitted over insecure quantum channels. Herein, a attack method for eavesdropping and tampering with phases of reference pulses is proposed, allowing the phase-compensation error in the receiver to be increased and secure-key rate of practical systems to be decreased. The secure-key rate of a practical system under phase attack of reference pulses is analyzed using the phase-compensation noise model. Moreover, a method for detecting phase attack is proposed, wherein the phase-compensation-noise variances are monitored. Simulation results show that the secure-key rate estimated by training signals is consistent with its theoretical value, and phase attack can be detected by monitoring phase-compensation-noise variances of the training signals and reference pulses.
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Biao Huang, Yongmei Huang, Zhenming Peng. Attack and Detection on Reference-Pulse Phase of Continuous-Variable Quantum-Key Distribution[J]. Acta Optica Sinica, 2019, 39(11): 1127001
Category: Quantum Optics
Received: May. 27, 2019
Accepted: Jul. 15, 2019
Published Online: Nov. 6, 2019
The Author Email: Huang Biao (1002970532@qq.com)