2019/03/11 by Anton Kozubov, Kozubov, Anton, Andrei Gaidash +3 · 1 citation
Computer Science · #Quantum Information and Cryptography #Quantum Computing Algorithms and Architecture #Chaos-based Image/Signal Encryption
paper · pdf · doi:10.48550/arxiv.1903.04371
In this paper we present finite-key security analysis for quantum key\ndistribution protocol based on weak coherent (in particular phase-coded) states\nusing a fully quantum asymptotic equipartition property technique. This work is\nthe extension of the proof for non-orthogonal states on the coherent states.\nBelow we consider two types of attacks each of them maximizes either Alice-Eve\nor Eve-Bob mutual information. The cornerstone of this paper is that we do\nassume the possibility of crucial intercept-resend attack based on errorless\nunambiguous state discrimination measurement. We demonstrate that Holevo bound\nalways gives the highest mutual information between Alice and Eve regardless\nparticular kind of isometry. As the main result we present the dependence of\nthe extracted secret key length. As the example we implement the proposed\nanalysis to the subcarrier wave quantum key distribution protocol.\n