alt Hacker NewsI doubt how useful it would be as an attack. As a single point of info it tells you next to nothing. As part of a composition of other indicators it would be the weak link in the chain probably just causing noise for the not un-likly scenario where the person you're targeting is using a VPN.
If it was any less specific we'd be talking about a deanonymization attack that outs whether or not a target is still on Earth.
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mmooss • 01/21/2025
> not un-likly scenario where the person you're targeting is using a VPN
Do you think a large proportion of Signal users also use VPNs? I'd expect it would be a higher proportion than the general population but still only a small minority.
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Oh, this attack would be a useful tool for e.g., identifying whistleblowers that travel a lot (e.g., in academia, military). If you know their Signal ID, you could send them images from time to time and then compare their coarse locations with travel information for a number of suspects.