this post was submitted on 16 Jul 2024
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It’s never been easier for the cops to break into your phone (www.theverge.com)
submitted 9 months ago by [email protected] to c/[email protected]
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[–] [email protected] 6 points 9 months ago* (last edited 9 months ago)

Capacitive sensors are looking at capacitance of a material, everything has this not just living things and it certainly doesn't require putting current through the material. You can for example get capacitive sensors for sensing the presence of cardboard, and they're often used for detecting metal parts (obviously tuned to the specific material). This is also why water droplets mess up touch screens (and the biometric sensor), because it's close enough to the capacitance of a finger (we're mostly water after all) to trick it and create false triggers.