this post was submitted on 23 Jun 2025
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Because analysing network traffic wouldn't allow an adversary to see what you're sending with Signal, but they could still tell you're sendig a secure message.
What the Guardian is doing is hiding that secure chat traffic inside the Guardian app, so packet sniffing would only show you're accessing news.
I downloaded the guardian app and couldn't find the option.
How are they analyzing network traffic with Signal? It's encrypted. And why does it matter if they know you're sending a message? Literally everyone using Signal is sending a message.
Using an encrypted messaging app could itself be a red flag, using a news app is normal behavior.
It isn't.
It's a red flag to those who think you're going to share internal info.
Or it's just a perfectly normal thing that billions of people do every day?
Except that signal is blocked by many companies Mobile Device Management. The one that don’t can typically see who has the app installed. This provides a new clever way to maybe whistleblow
Use a different device? Use Molly? Use any number of other apps? What's to stop the MDM from blocking The Guardian app?
Timing of messages. They can't tell what you send, but can tell when
No they can't.
E: if someone wants to provide evidence to the contrary instead of just downvoting and moving on, please, go ahead.
It's called traffic analysis
It's called encryption
How exactly do you think encryption prevents the analysis of seeing when an encrypted message is sent? It feels like you're trying to hand-waive away by saying "encryption means you're good!"
Cyber security is not my thing, but my understanding is that you'd still see network traffic - you just wouldn't know what it says.
I run a cryptography forum
Encryption doesn't hide data sizes unless you take extra steps
Packet data has headers that can identify where it's coming from and where it's going to. The contents of the packet can be securely encrypted, but destination is not. So long as you know which IPs Signal's servers use (which is public information), it's trivial to know when a device is sending/receiving messages with Signal.
This is also why something like Tor manages to circumvent packet sniffing, it's impossible to know the actual destination because that's part of the encrypted payload that a different node will decrypt and forward.