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Quantum Cryptography Security

Critical side channel effects in random bit generation with multiple semiconductor lasers in a polarization-based quantum key distribution system

arXiv
Authors: Heasin Ko, Byung-Seok Choi, Joong-Seon Choe, Kap-Joong Kim, Jong-Hoi Kim, Chun Ju Youn

Year

2017

Paper ID

44968

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

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, which significantly endangers 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 furtherly addressed with experimental results.

Why This Paper Matters

  • This paper contributes to the Quantum Cryptography & Security research area in the Quantum Articles archive.
  • It adds a 2017 reference point for readers tracking recent quantum research.
  • Most polarization-based BB84 quantum key distribution (QKD) systems utilize multiple lasers to generate one of four polarization quantum states randomly.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1706.08705 [2] arXiv https://arxiv.org/abs/1706.08705 [3] Publisher https://arxiv.org/abs/1706.08705

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