Article:Papanastasiou, Panagiotis, Ottaviani, Carlo orcid.org/0000-0002-0032-3999 and Pirandola, Stefano orcid.org/0000-0001-6165-5615 (2017) We study the impact of finite-size effects on the key rate of continuous-variable (CV) measurement-deviceindependent (MDI) quantum key distribution (QKD), considering two-mode Gaussian attacks. Inspired by the parameter estimation technique developed in by Ruppert et al. [Phys. Rev. A 90, 062310 (2014)], we adapt it to study CV-MDI-QKD and, assuming realistic experimental conditions, we analyze the impact of finite-size effects on the key rate. We find that the performance of the protocol approaches the ideal one, increasing the block size, and, most importantly, that blocks between 10 6 and 10 9 data points may provide key rates ∼10 −2 bit/use over metropolitan distances.