Unconditional Security of Sending or Not Sending Twin-Field Quantum Key Distribution with Finite Pulses

2019/04/12 by Cong Jiang, Zong-Wen Yu, Zong‐Wen Yu +4
Computer Science · Mathematics · Physics and Astronomy · #Computer network #Computer science #Computer security #Encryption #Field (mathematics) #Key (lock) #Key distribution #Mathematics #Physics #Protocol (science) #Public-key cryptography #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum key distribution #Quantum mechanics #Scheme (mathematics) #Theoretical computer science #quant-ph

paper · pdf · doi:10.1103/physrevapplied.12.024061

published as Phys. Rev. Applied 12, 024061 (2019) · Our results with finite number of pulses are secure under general attacks including whatever coherent attack

openalex created_date 2019/04/11 · arxiv created 2019/04/12 · openalex publication_date 2019/08/29 · arxiv updated 2019/09/02 · openalex updated_date 2026/08/05

Abstract

For encrypted communication, the ``sending or not sending'' protocol of twin-field quantum key distribution has the advantages of proven unconditional security against any coherent attack, and fault tolerance to large misalignment error. The existing security proof is based on infinite key length, however. Here the authors consider the complete finite-key effects for this protocol under the universally composable framework. Numerical simulation shows that in practice this scheme can exceed a secure distance of 500 km for a typical, finite number of pulses, even with large misalignment error. The results of this work could be directly applied in experiment.

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