Manuscript received June 7, 2020; revised November 8, 2020; accepted December 23, 2020. Date of publication January 11, 2021; date of current version March 18, 2021. The work of Uzi Pereg was supported in part by the Bundesministerium für Bildung und Forschung (BMBF) under Grant 16KIS0856 and in part by the Viterbi Scholarship of the Technion. The work of Christian Deppe was supported by the Bundesministerium für Bildung und Forschung (BMBF) under Grant 16KIS0856. The work of Holger Boche was supported in part by the Bundesministerium für Bildung und Forschung (BMBF) under Grant 16KIS0858, in part by the German Federal Ministry of Education and Research (BMBF) within the national initiative for “Post Shannon Communication (NewCom)” under Grant 16KIS1003K, in part by the German Research Foundation (DFG) within the Gottfried Wilhelm Leibniz Prize under Grant BO 1734/20-1, and in part by the German Research Foundation (DFG) within the Germany's Excellence Strategy under Grant EXC-2092 - 390781972 and Grant EXC-2111 - 390814868. This article was presented in part at the 2020 Munich Conference on Quantum Science and Technology (MCQST), in part at the 2020 IEEE Information Theory Workshop (ITW), and in part at the 24th Annual Conference on Quantum Information Processing (QIP 2021). (Corresponding author: Uzi Pereg.) Uzi Pereg and Christian Deppe are with the Institute for Communica- tions Engineering, Technische Universität München, 80333 Munich, Germany (e-mail: uzi.pereg@tum.de; christian.deppe@tum.de). Holger Boche is with the Institute of Theoretical Information Tech- nology, Technische Universität München, 80290 Munich, Germany, also with the Munich Center for Quantum Science and Technology (MCQST), 80799 Munich, Germany, and also with the CASA—Cyber Security in the Age of Large-Scale Adversaries–Excellenzcluster, Ruhr-Universität Bochum, 44801 Bochum, Germany (e-mail: boche@tum.de). Communicated by M. M. Wilde, Associate Editor for Quantum Information Theory. Color versions of one or more figures in this article are available at https://doi.org/10.1109/TIT.2021.3050529. Digital Object Identifier 10.1109/TIT.2021.3050529