中国物理B ›› 2016, Vol. 25 ›› Issue (8): 80309-080309.doi: 10.1088/1674-1056/25/8/080309
Quantum hacking of two-way continuous-variable quantum key distribution using Trojan-horse attack
Hong-Xin Ma(马鸿鑫), Wan-Su Bao(鲍皖苏), Hong-Wei Li(李宏伟), Chun Chou(周淳)
- 1 PLA Information Engineering University, Zhengzhou 450001, China;
2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
Quantum hacking of two-way continuous-variable quantum key distribution using Trojan-horse attack
Hong-Xin Ma(马鸿鑫)1,2, Wan-Su Bao(鲍皖苏)1,2, Hong-Wei Li(李宏伟)1,2, Chun Chou(周淳)1,2
- 1 PLA Information Engineering University, 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：
We present a Trojan-horse attack on the practical two-way continuous-variable quantum key distribution system. Our attack mainly focuses on the imperfection of the practical system that the modulator has a redundancy of modulation pulse-width, which leaves a loophole for the eavesdropper inserting a Trojan-horse pulse. Utilizing the unique characteristics of two-way continuous-variable quantum key distribution that Alice only takes modulation operation on the received mode without any measurement, this attack allows the eavesdropper to render all of the final keys shared between the legitimate parties insecure without being detected. After analyzing the feasibility of the attack, the corresponding countermeasures are put forward.
中图分类号: (Quantum communication)
- 03.67.Hk