Topological Quantum Bit-Based Quantum Key Distribution Protocol

Jincheng Zhang

Published Sep 3, 2026• 0 citations

Abstract

This paper presents a novel quantum key distribution (QKD) protocol leveraging the unique properties of topological quantum bits (TQBs). Traditional QKD protocols are vulnerable to attacks exploiting imperfections in quantum hardware. TQBs, due to their inherent robustness against local perturbations and decoherence, offer a promising solution for enhancing security. This protocol, termed TQB-QKD, utilizes the topological protection inherent in TQBs to establish a key between two parties, Alice and Bob. The core of the protocol revolves around the measurement of the non-local properties of TQBs, resulting in a highly secure key exchange. We detail the protocol's key generation steps, error correction, and privacy amplification stages, emphasizing the advantages derived from TQB characteristics. The protocol is designed to mitigate potential attacks targeting qubit decoherence and measurement errors, offering a pathway towards more secure and practical QKD systems. The theoretical analysis demonstrates the improved security margin compared to conventional QKD protocols.

DOI: 10.5281/zenodo.22270119

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