Quantum hacking perceiving for quantum key distribution using temporal ghost imaging

TL;DR

This paper introduces a novel method using temporal ghost imaging to detect quantum hacking in quantum key distribution systems, enhancing practical security by analyzing temporal fingerprints of quantum signals.

Contribution

It is the first to propose and experimentally verify the use of temporal ghost imaging for perceiving quantum hacking in QKD systems, offering a new security perspective.

Findings

Successfully demonstrated temporal ghost imaging for quantum hacking detection

Enhanced understanding of quantum signal characteristics during attacks

Potential to improve QKD security against side-channel attacks

Abstract

Quantum key distribution (QKD) can generate secure key bits between remote users with quantum mechanics. However, the gap between the theoretical model and practical realizations gives eavesdroppers opportunities to intercept secret key. The most insidious attacks, known as quantum hacking, are the ones with no significant discrepancy of the measurement results using side-channel loopholes of QKD systems. Depicting full-time-scale characteristics of the quantum signals, the quantum channel, and the QKD system can provide legitimate users extra capabilities to defeat malicious attacks. For the first time, we propose the method exploring temporal ghost imaging (TGI) scheme to perceive quantum hacking with temporal fingerprints and experimentally verify its validity. The scheme presents a common approach to promote QKD's practical security from a new perspective of signals and systems.