A tool can listen in on somebody speaking close to a fibre-optic cable, even when there’s a massive distance between them



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27 July 2022

Optical fibres

Fibre-optic cables use gentle to transmit information

Russell Kord/Alamy

Fibre-optic cables, resembling these utilized in web infrastructure, could possibly be used for eavesdropping. A tool that may decide up tiny adjustments in alerts despatched by way of the cables can detect phrases spoken from over a kilometre away.

Optical fibres use beams of sunshine to transport information internationally, underground and within the oceans. Researchers have beforehand discovered that these cables can be used as sensors – for instance, to detect earthquakes and observe whales. Now, Bo Wang at Tsinghua College in …

By 24H

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