aiqbench analysis
This research rigorously benchmarks specific individual attacks—minimum error discrimination and quantum cloning—against differential phase shift QKD protocols, revealing that their practical thresholds are significantly higher than theoretical limits. By quantifying induced error rates under realistic conditions, the study provides essential data for experimental validation and risk assessment in current quantum communication implementations. It highlights that while these specific strategies are suboptimal compared to coherent attacks, understanding their exact impact remains vital for robust protocol calibration.
Explicit attacks on differential phase shift quantum key distribution
arXiv:2305.11822v3 Announce Type: replace Abstract: In the well-established framework of quantum key distribution (QKD), differential phase shift (DPS) protocols have known information-theoretic security bounds defining tolerable error rates under optimal adversaries. In this work, we revisit the security of 3- and n-pulse DPS QKD by explicitly analyzing two specific, physically implementable individual attacks: minimum error discrimination (MED) and quantum cloning. Using semidefinite programming, we characterize these attacks in detail and quantify their induced quantum bit error rates (QBER) and resulting secure key rates under realistic system assumptions. The critical QBER thresholds for these attacks are approximately 20%, significantly higher than the theoretical lower bounds of 6% for individual and 4% for coherent attacks, indicating these are suboptimal adversarial strategies. This study primarily serves as a practical exercise to benchmark known attacks, providing explicit measures that aid experimental validation, protocol calibration, and risk assessment within current technological capabilities. Additionally, we explore finite-size effects and the effectiveness of phase randomization in weak coherent source-based protocols as protection against unambiguous state discrimination attacks.
Abstract:In the well-established framework of quantum key distribution (QKD), differential phase shift (DPS) protocols have known information-theoretic security bounds defining tolerable error rates under optimal adversaries. In this work, we revisit the security of 3- and n-pulse DPS QKD by explicitly analyzing two specific, physically implementable individual attacks: minimum error discrimination (MED) and quantum cloning. Using semidefinite programming, we characterize these attacks in detail and quantify their induced quantum bit error rates (QBER) and resulting secure key rates under realistic system assumptions. The critical QBER thresholds for these attacks are approximately 20%, significantly higher than the theoretical lower bounds of 6% for individual and 4% for coherent attacks, indicating these are suboptimal adversarial strategies. This study primarily serves as a practical exercise to benchmark known attacks, providing explicit measures that aid experimental validation, protocol calibration, and risk assessment within current technological capabilities. Additionally, we explore finite-size effects and the effectiveness of phase randomization in weak coherent source-based protocols as protection against unambiguous state discrimination attacks.
arXiv:2305.11822 [quant-ph]
(or arXiv:2305.11822v3 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2305.11822 Focus to learn more arXiv-issued DOI via DataCite
https://doi.org/10.1007/s44464-026-00036-6 Focus to learn more DOI(s) linking to related resources
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