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arXiv:2207.05267cs.SD

Indoor optical fiber eavesdropping approach and its avoidance

Haiqing Hao, Zhongwang Pang, Guan Wang, Bo Wang

Abstract

The optical fiber network has become a worldwide infrastructure. In addition to the basic functions in telecommunication, its sensing ability has attracted more and more attention. In this paper, we discuss the risk of household fiber being used for eavesdropping and demonstrate its performance in the lab. Using a 3-meter tail fiber in front of the household optical modem, voices of normal human speech can be eavesdropped by a laser interferometer and recovered 1.1 km away. The detection distance limit and system noise are analyzed quantitatively. We also give some practical ways to prevent eavesdropping through household fiber.

arXiv comments
8 pages, 4 figures, submitted to Optics Express
Journal reference
DOI
doi:10.1364/OE.470529
Subjects
cs.SDSound eess.ASAudio and Speech Processing physics.ins-detInstrumentation and Detectors physics.opticsOptics

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Linked by 2 identifiable commenters in 2 comments across 1 thread, from Jul 2022 to Jul 2022. Found in 1 HN submission from Jul 2022 to Jul 2022. Open submission discussions.

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  1. Fibre-optic cables could be used to spy on people a kilometre away 2 comments

    • I think this is the OP: https://arxiv.org/abs/2207.05267 Note the headline may confuse: the reference to 1 Km relates to the fiber run between the eavesdropping equipment and the target. It's only picking up sound in the same room, not 1 Km away.

      dborehamView on HNParent context

    • https://arxiv.org/abs/2207.05267

      isattyView on HNParent context

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