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There's a "Signal deanonymized" thing going around:
gist.github.com/hackermondev/4

Stay calm. Deep breaths.

👉 while this is a real consideration, the only thing the attacker gets from this is a very rough (kilometers or tens of kilometers radius) location

👉 other communication platforms that use any kind of caching CDN to deliver attachments are just as affected

👉 you almost certainly should continue to use Signal, unless you specifically know that this is a big problem for you.

Unique 0-click deanonymization attack targeting Signal, Discord and hundreds of platform - research.md
GistUnique 0-click deanonymization attack targeting Signal, Discord and hundreds of platformUnique 0-click deanonymization attack targeting Signal, Discord and hundreds of platform - research.md

@rysiek while I agree with your last point and mitigations, the first point irks me, as we arrived at a re-identifiaction rate of 80% in datasets based on cell tower locations and connected users already in 2008[1]. At that time this was comparably sparse data. Later work on less sparse data achieves even better results and that’s all before the current proliferation of GPUs. It’s never just location, sets of locations are intricately linked to identities @0xfffffffe

[1] researchgate.net/profile/Yoni-

Michał "rysiek" Woźniak · 🇺🇦

@ll1t @0xfffffffe fair point. Just to be clear, I'd like Signal to treat this as an issue and make sure this is fixed. But this is not something to switch away from Signal over, unless one's threat model is very very specific.

@rysiek @ll1t @0xfffffffe Location data is in my opinion probably worth an "adjust settings so this is harder to hit without user interaction", as you suggested up-thread, for people with moderate risks. It has a nasty tendency to be possible to refine over time, in the hands of persistent stalkers.