Panagiotis Papanastasiou, Carlo Ottaviani, Stefano Pirandola.
Submitted to arXiv on 18 May 2021.
We investigate the performance of Gaussianmodulated coherent-state QKD protocols in the presence of canonical attacks, which are collective Gaussian attacks resulting in Gaussian channels described by one of the possible canonical forms. We present asymptotic key rates and then we extend the results to the finite-size regime using a recently-developed toolbox for composable security.
