Interesting, I feared Sealed Sender might be susceptible to statistical analysis (hence my phrasing "reduce it a bit") but it's worse than I expected ("Signal could link sealed sender users in as few as 5 message"). Thanks for the link!
As for TOR, that wouldn't really help much, would it, given that the described attack is at the application level of Signal. Or are you talking about not using Signal altogether?
As for TOR, that wouldn't really help much, would it, given that the described attack is at the application level of Signal. Or are you talking about not using Signal altogether?