This is a year-old paper but now there is an easy-to-use implementation of the attack: https://github.com/gommzystudio/device-activity-tracker

Signal developers' verdict is WONTFIX: https://github.com/signalapp/Signal-Android/pull/14463

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[–] 5 points 10 months ago (1 child)

Is there any reason to use Signal over Matrix?

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