상세정보
학술지
Critical Side Channel Effects in Random Bit Generation with Multiple Semiconductor Lasers in a Polarization-based Quantum Key Distribution System
- 발행일
- 201708
- 출처
- Optics Express, v.25 no.17, pp.20045-20055
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 초록
- Most polarization-based BB84 quantum key distribution (QKD) systems utilize multiple lasers to generate one of four polarization quantum states randomly. However, random bit generation with multiple lasers can potentially open critical side channels that significantly endanger the security of QKD systems. In this paper, we show unnoticed side channels of temporal disparity and intensity fluctuation, which possibly exist in the operation of multiple semiconductor laser diodes. Experimental results show that the side channels can enormously degrade security performance of QKD systems. An important system issue for the improvement of quantum bit error rate (QBER) related with laser driving condition is further addressed with experimental results.
- KSP 제안 키워드
- Bit Error Rate(And BER), Distribution System, Driving conditions, Intensity fluctuation, Laser diode(LD), Quantum bit error rate, Quantum states, Random bit generation, Security Performance, Semiconductor lasers, Side channel