Comment by derefr

Huh. I always took the cynical view and assumed that this was something every proprietary OS was already doing, and that this was part of why dark-web die-hards were so insistent on using TAILS. Guess "not yet."

On another note—OSes may only be starting to do this, but that same cynicism still leads me to presume that arbitrary closed-source third-party apps — or even closed-source binary distributions of open-source apps (e.g. the App Store versions of FOSS software) — could have been quietly scanning the files people are passing them for CSAM for years now, without telling users about it. It always seemed to me like the kind of thing it'd make sense to quietly slip into a media player like VLC.