475
A fresh install of Signal takes up 410MB, blowing both Firefox and Chromium out of the water
(lemmy.world)
... and I can't even continue the chat from my phone.
this post was submitted on 12 Jun 2024
475 points (93.6% liked)
Mildly Infuriating
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Yes, full disk encryption helps against intruders with device access, but not against the files being indexed by other application. My phone is encrypted, but I still use a signal client that is encrypted again.
Hm, but wouldn't such an application be malicious by default? Having protection against attackers on your device seems of out scope for a messaging application, at that point I would consider something like Tails. Though this may be a rare case when moving to an appimage could help matters.
Yes and no. I personally would like to be asked permission for such behaviour, but a gallery application, for example, could have legitimate reasons to index all photos on your system. I personally prefer to manually set the folders it is supposed to index, but that doesn't seem to be a generally accepted paradigm.
In general, I see why you need to trust that a system your app runs on is uncompromised to a a certain degree, but measures to potentially limit harm in case it is still seem sensible, especially for an app with a focus on privacy and security.
We set the threshold of sensible protections provided by the app (signal) itself differently.
On desktop having a gallery app, as you say, or running an application like windirstat for example I expect the user to understand that anything stored on device can be "seen" by the app and that, if they dont trust it, having sensitive files deleted or sandboxed might be prudent. Messages are stored at least somewhat encrypted (albeit with the key in a config file) so a random (non targeted/malicious) scan would gt blobs there.
On mobile due to how opaque the os is I am thankful for the extra encyption and I would consider it a much more critical flaw. On desktop less so. Still I appreciate your point of view and a passkey to encrypt at least messages on the desktop app would be a welcome addition.
Am encrypted container doesn't help if the directory is mounted and accessible or if the key is in plaintext. Also doesn't help if the process isn't isolated. You need a bunch of extra measures like using the OS keystore set to only allow the correct program to retrieve the key, keeping secrets only in process memory, etc.
Tldr it's a lot of work to do it right. If you do it the simple way like throwing it all in SQLite with encryption active you still leak metadata.
I have never worked on a properly hardened desktop app, so I don't have much of a perspective on that, and can definitely see that it might not be worthwhile for the signal team.
I would appreciate some level of encryption, thinking that it might help with less targeted attacks. I'd also appreciate a Web client, like Threema's with none permanent sessions. But all that's, as you'd say in German, "Meckern auf hohem Niveau", especially since I'm not currently contributing to Signal.