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Experimental vulnerability analysis of QKD based on attack ratings

Abstract : Abstract Inspired by the methodology used for classical cryptographic hardware, we consider the use of attack ratings in the context of QKD security evaluation. To illustrate the relevance of this approach, we conduct an experimental vulnerability assessment of CV-QKD against saturation attacks, for two different attack strategies. The first strategy relies on inducing detector saturation by performing a large coherent displacement. This strategy is experimentally challenging and therefore translates into a high attack rating. We also propose and experimentally demonstrate a second attack strategy that simply consists in saturating the detector with an external laser. The low rating we obtain indicates that this attack constitutes a primary threat for practical CV-QKD systems. These results highlight the benefits of combining theoretical security considerations with vulnerability analysis based on attack ratings, in order to guide the design and engineering of practical QKD systems towards the highest possible security standards.
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https://hal.telecom-paris.fr/hal-03221668
Contributor : Romain Alléaume <>
Submitted on : Sunday, May 9, 2021 - 3:03:03 PM
Last modification on : Friday, May 28, 2021 - 3:37:52 AM

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Rupesh Kumar, Francesco Mazzoncini, Hao Qin, Romain Alléaume. Experimental vulnerability analysis of QKD based on attack ratings. Scientific Reports, Nature Publishing Group, 2021, 11 (1), ⟨10.1038/s41598-021-87574-4⟩. ⟨hal-03221668⟩

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