Comment on ProtonMail voluntarily offers Assistance for Real-Time Surveillance
birdcat@lemmy.ml 7 months agobasically.
even minimal metadata for example from signal contains
Message dates and times
Message senders and recipients (via phone number identifiers)
From these 2 pieces of information, its possible to build social graphs: who talked to who, and when they did it. Also, who’s in a group chat with who else.
github.com/dessalines/essays/…/why_not_signal.md#…
(worth to read in full)