中国物理B ›› 2018, Vol. 27 ›› Issue (8): 80305-080305.doi: 10.1088/1674-1056/27/8/080305
Controlling a sine wave gating single-photon detector by exploiting its filtering loophole
Lin-Xi Feng(冯林溪), Mu-Sheng Jiang(江木生), Wan-Su Bao(鲍皖苏), Hong-Wei Li(李宏伟), Chun Zhou(周淳), Yang Wang(汪洋)
- 1 Henan Key Laboratory of Quantum Information and Cryptography, Zhengzhou Information Science and Technology Institute, Zhengzhou 450001, China;
2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
Controlling a sine wave gating single-photon detector by exploiting its filtering loophole
Lin-Xi Feng(冯林溪)1,2, Mu-Sheng Jiang(江木生)1,2, Wan-Su Bao(鲍皖苏)1,2, Hong-Wei Li(李宏伟)1,2, Chun Zhou(周淳)1,2, Yang Wang(汪洋)1,2
- 1 Henan Key Laboratory of Quantum Information and Cryptography, Zhengzhou Information Science and Technology Institute, Zhengzhou 450001, China;
2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
摘要： GHz single-photon detector (SPD) is a crucial part in the practical high speed quantum key distribution (QKD) system. However, any imperfections in a practical QKD system may be exploited by an eavesdropper (Eve) to collect information about the key without being discovered. The sine wave gating SPD (SG-SPD) based on InGaAs/InP avalanche photodiode, one kind of practical high speed SPD, may also contain loopholes. In this paper, we study the principle and characteristic of the SG-SPD and find out the filtering loophole of the SG-SPD for the first time. What is more, the proof-of-principle experiment shows that Eve could blind and control Bob's SG-SPD by exploiting this loophole. We believe that giving enough attention to this loophole can improve the practical security of the existing QKD system.
中图分类号: (Quantum cryptography and communication security)
- 03.67.Dd